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Catherine, Duchess of Cambridge visits Cape Hill Children's Centre on February 18, 2015 in Smethwick, England. (Photo by Eddie Mulholland – WPA Pool/Getty Images)

Catherine, Duchess of Cambridge visits Cape Hill Children's Centre on February 18, 2015 in Smethwick, England. (Photo by Eddie Mulholland – WPA Pool/Getty Images)

Catherine, Duchess of Cambridge visits Cape Hill Children's Centre on February 18, 2015 in Smethwick, England. (Photo by Eddie Mulholland – WPA Pool/Getty Images)

Catherine, Duchess of Cambridge visits Cape Hill Children's Centre on February 18, 2015 in Smethwick, England. (Photo by Eddie Mulholland – WPA Pool/Getty Images)

Catherine, Duchess of Cambridge visits Cape Hill Children's Centre on February 18, 2015 in Smethwick, England. (Photo by Eddie Mulholland – WPA Pool/Getty Images)

Catherine, Duchess of Cambridge visits Cape Hill Children’s Centre on February 18, 2015 in Smethwick, England. (Photo by Eddie Mulholland – WPA Pool/Getty Images)

Catherine, Duchess of Cambridge visits the ‘Emma Bridgewater’ pottery factory to view the production of a mug that the company has launched in support of East Anglia’s Children’s Hospices on February 18, 2015 in Stoke-on-Trent, Staffordshire, England. (Photo by Oli Scarff – WPA Pool/Getty Images)

Catherine, Duchess of Cambridge visits the ‘Emma Bridgewater’ pottery factory to view the production of a mug that the company has launched in support of East Anglia’s Children’s Hospices on February 18, 2015 in Stoke-on-Trent, Staffordshire, England. (Photo by Oli Scarff – WPA Pool/Getty Images)

Kate Middleton in Stoke on Feb. 18, 2015. (SplashNews)

Kate Middleton in Stoke on Feb. 18, 2015. (SplashNews)

Kate Middleton in Stoke on Feb. 18, 2015. (SplashNews)

Kate Middleton in Stoke on Feb. 18, 2015. (SplashNews)

Kate Middleton in Stoke on Feb. 18, 2015. (SplashNews)

Kate Middleton visits the ‘Emma Bridgewater’ pottery factory in Stoke on Feb. 18, 2015. (Getty)

Kate Middleton visits the ‘Emma Bridgewater’ pottery factory in Stoke on Feb. 18, 2015. (Getty)

Kate Middleton visits the ‘Emma Bridgewater’ pottery factory in Stoke on Feb. 18, 2015. (Getty)

Kate Middleton visits the ‘Emma Bridgewater’ pottery factory in Stoke on Feb. 18, 2015. (Getty)

Catherine, Duchess of Cambridge, patron of the 1851 Trust, tries a sailing winch simulator as part of a visit to Portsmouth to see the construction site of Ben Ainslie Racing new headquarters and visitor centre at the Spinnaker Tower on February 12, 2015 in Portsmouth, England. (Photo by Christopher Pledger/WPA Pool/Entertainment/Getty Images)

Catherine, Duchess of Cambridge, patron of the 1851 Trust, tries a sailing winch simulator as part of a visit to Portsmouth to see the construction site of Ben Ainslie Racing new headquarters and visitor centre at the Spinnaker Tower on February 12, 2015 in Portsmouth, England. (Photo by Christopher Pledger/WPA Pool/Entertainment/Getty Images)

Catherine, Duchess of Cambridge, patron of the 1851 Trust, tries a sailing winch simulator as part of a visit to Portsmouth to see the construction site of Ben Ainslie Racing new headquarters and visitor centre at the Spinnaker Tower on February 12, 2015 in Portsmouth, England. (Photo by Christopher Pledger/WPA Pool/Entertainment/Getty Images)

Duchess of Cambridge laughs as she visits the home of Ben Ainslie Racing (BAR) in Portsmouth Old Town on February 12, 2015 in Portsmouth, England (Courtesy of Instagram)

The Duchess of Cambridge enjoys the view from the top of the Spinnaker Tower in Portsmouth on February 12, 2015 in Portsmouth, England (Courtesy of Instagram)

The Duchess of Cambridge receives a miniature version of the Ben Ainslie Racing team kit for Prince George on February 12, 2015 in Portsmouth, England (Courtesy of Instagram)

Duchess of Cambridge laughs as she visits the home of Ben Ainslie Racing (BAR) in Portsmouth Old Town on February 12, 2015 in Portsmouth, England. (SplashNews)

Duchess of Cambridge laughs as she visits the home of Ben Ainslie Racing (BAR) in Portsmouth Old Town on February 12, 2015 in Portsmouth, England. (SplashNews)

Duchess of Cambridge laughs as she visits the home of Ben Ainslie Racing (BAR) in Portsmouth Old Town on February 12, 2015 in Portsmouth, England. (SplashNews)

Duchess of Cambridge laughs as she visits the home of Ben Ainslie Racing (BAR) in Portsmouth Old Town on February 12, 2015 in Portsmouth, England. (Photo by Chris Jackson/Getty Images)

Duchess of Cambridge laughs as she visits the home of Ben Ainslie Racing (BAR) in Portsmouth Old Town on February 12, 2015 in Portsmouth, England. (Photo by Chris Jackson/Getty Images)

Catherine, Duchess of Cambridge arrives to attend a coffee morning at Family Friends in Kensington on January 19, 2015 in London, England. Family Friends is a voluntary organisation to help families in deprived areas of the borough of Kensington. (Photo by Stefan Wermuth – WPA Pool/Entertainment/Getty Images)

Catherine, Duchess of Cambridge arrives to attend a coffee morning at Family Friends in Kensington on January 19, 2015 in London, England. Family Friends is a voluntary organisation to help families in deprived areas of the borough of Kensington. (Photo by Stefan Wermuth – WPA Pool/Getty Images)

Catherine, Duchess of Cambridge arrives to attend a coffee morning at Family Friends in Kensington on January 19, 2015 in London, England. Family Friends is a voluntary organisation to help families in deprived areas of the borough of Kensington. (Photo by Stefan Wermuth – WPA Pool/Getty Images)

Catherine, Duchess of Cambridge arrives to attend a coffee morning at Family Friends in Kensington on January 19, 2015 in London, England. Family Friends is a voluntary organisation to help families in deprived areas of the borough of Kensington. (Photo by Stefan Wermuth – WPA Pool/Getty Images)

Catherine, Duchess of Cambridge arrives to attend a coffee morning at Family Friends in Kensington on January 19, 2015 in London, England. Family Friends is a voluntary organisation to help families in deprived areas of the borough of Kensington. (Photo by Stefan Wermuth – WPA Pool/Getty Images)

Catherine, Duchess of Cambridge attends an event hosted by The Fostering Network to celebrate the work of foster carers in providing support to vulnerable young people on January 16, 2015 in London, England. (Photo by Lefteris Pitarakis – WPA Pool/Entertainment/Getty Images)

Catherine, Duchess of Cambridge attends an event hosted by The Fostering Network to celebrate the work of foster carers in providing support to vulnerable young people on January 16, 2015 in London, England. (Photo by Lefteris Pitarakis – WPA Pool/Entertainment/Getty Images)

Catherine, Duchess of Cambridge meets to 6-month-old Naya, who has been in foster care for 4 months, during an event hosted by The Fostering Network to celebrate the work of foster carers in providing support to vulnerable young people on January 16, 2015 in London, England. (Photo by Lefteris Pitarakis – WPA Pool/Entertainment/Getty Images)

Catherine, Duchess of Cambridge attends an event hosted by The Fostering Network to celebrate the work of foster carers in providing support to vulnerable young people on January 16, 2015 in London, England. (Photo by Lefteris Pitarakis – WPA Pool/Entertainment/Getty Images)

Catherine, Duchess of Cambridge attends an event hosted by The Fostering Network to celebrate the work of foster carers in providing support to vulnerable young people on January 16, 2015 in London, England. (Photo by Lefteris Pitarakis – WPA Pool/Entertainment/Getty Images)

Catherine, Duchess of Cambridge leaves an event hosted by The Fostering Network to celebrate the work of foster carers in providing support to vulnerable young people on January 16, 2015 in London, England. (Photo by Chris Jackson/Entertainment/Getty Images)

Catherine, Duchess of Cambridge is presented with flowers by a young child as she leaves an event hosted by The Fostering Network to celebrate the work of foster carers in providing support to vulnerable young people on January 16, 2015 in London, England. (Photo by Chris Jackson/Entertainment/Getty Images)

Catherine, Duchess of Cambridge attends an event hosted by The Fostering Network to celebrate the work of foster carers in providing support to vulnerable young people on January 16, 2015 in London, England. (Photo by Chris Jackson/Entertainment/Getty Images)

Catherine, Duchess of Cambridge attends an event hosted by The Fostering Network to celebrate the work of foster carers in providing support to vulnerable young people on January 16, 2015 in London, England. (Photo by Chris Jackson/Entertainment/Getty Images)

Catherine, Duchess of Cambridge arrives for a visit to Barlby Primary School on January 15, 2015 in London, England. The Duchess of Cambridge is visiting the Clore Art Room at Barlby School to support the charity ‘The Art Room’ of which she is patron. (Photo by Chris Jackson/Entertainment/Getty Images)

Catherine, Duchess of Cambridge arrives for a visit to Barlby Primary School on January 15, 2015 in London, England. The Duchess of Cambridge is visiting the Clore Art Room at Barlby School to support the charity ‘The Art Room’ of which she is patron. (Photo by Chris Jackson/Entertainment/Getty Images)

Artist Grayson Perry looks on as Catherine, Duchess of Cambridge is presented with a childs chair during a visit to Barlby Primary School on January 15, 2015 in London, England. The Duchess of Cambridge is visiting the Clore Art Room at Barlby School to support the charity ‘The Art Room’ of which she is patron. (Photo by Chris Jackson/Entertainment/Getty Images)

Catherine, Duchess of Cambridge arrives for a visit to Barlby Primary School on January 15, 2015 in London, England. The Duchess of Cambridge is visiting the Clore Art Room at Barlby School to support the charity ‘The Art Room’ of which she is patron. (Photo by Chris Jackson/Entertainment/Getty Images)

Catherine, Duchess of Cambridge arrives for a visit to Barlby Primary School on January 15, 2015 in London, England. The Duchess of Cambridge is visiting the Clore Art Room at Barlby School to support the charity ‘The Art Room’ of which she is patron. (Photo by Chris Jackson/Entertainment/Getty Images)

Catherine, Duchess of Cambridge arrives for a visit to Barlby Primary School on January 15, 2015 in London, England. The Duchess of Cambridge is visiting the Clore Art Room at Barlby School to support the charity ‘The Art Room’ of which she is patron (SplashNews)

Catherine, Duchess of Cambridge arrives for a visit to Barlby Primary School on January 15, 2015 in London, England. The Duchess of Cambridge is visiting the Clore Art Room at Barlby School to support the charity ‘The Art Room’ of which she is patron (SplashNews)

Britain’s Catherine, Duchess of Cambridge, lifts her blindfold, after being helped to ice a cake by Fynley Gooch, aged 7, as she promotes disability awareness while meeting with children at the newly established 23rd Poplar Beaver Scout Colony on December 16, 2014 in east London, England. The Duchess’s visit supports the Scout Association’s ‘Better Prepared’ campaign, which aims to help communities to deliver Scouting to two hundred locations across the UK where Scouting can have the biggest impact. (Photo by Ben Stansall – WPA Pool/Getty Images)

Britain’s Catherine, Duchess of Cambridge, lifts her blindfold, after being helped to ice a cake by Fynley Gooch, aged 7, as she promotes disability awareness while meeting with children at the newly established 23rd Poplar Beaver Scout Colony on December 16, 2014 in east London, England. The Duchess’s visit supports the Scout Association’s ‘Better Prepared’ campaign, which aims to help communities to deliver Scouting to two hundred locations across the UK where Scouting can have the biggest impact. (Photo by Ben Stansall – WPA Pool/Getty Images)

Britain’s Catherine, Duchess of Cambridge, lifts her blindfold, after being helped to ice a cake by Fynley Gooch, aged 7, as she promotes disability awareness while meeting with children at the newly established 23rd Poplar Beaver Scout Colony on December 16, 2014 in east London, England. The Duchess’s visit supports the Scout Association’s ‘Better Prepared’ campaign, which aims to help communities to deliver Scouting to two hundred locations across the UK where Scouting can have the biggest impact. (Photo by Ben Stansall – WPA Pool/Getty Images)

Britain’s Catherine, Duchess of Cambridge, lifts her blindfold, after being helped to ice a cake by Fynley Gooch, aged 7, as she promotes disability awareness while meeting with children at the newly established 23rd Poplar Beaver Scout Colony on December 16, 2014 in east London, England. The Duchess’s visit supports the Scout Association’s ‘Better Prepared’ campaign, which aims to help communities to deliver Scouting to two hundred locations across the UK where Scouting can have the biggest impact. (Photo by Ben Stansall – WPA Pool/Getty Images)

Catherine, Duchess of Cambridge attend the St. Andrews 600th Anniversary Dinner on December 9, 2014 in New York City. (Photo by Samir Hussein/WireImage)

Catherine, Duchess of Cambridge attends the St. Andrews 600th Anniversary Dinner on December 9, 2014 in New York City. (Photo by Samir Hussein/Pool/WireImage)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge visit the National September 11 Memorial & Museum on December 09, 2014 in New York City. The couple, who are traveling without their son Prince George, are on a three-day US east coast visit. This is the Duke and Duchess’ first official visit to New York City. ( Photo By Robert Sabo – Pool/Entertainment/Getty Images)

Catherine, Duchess of Cambridge takes part in gift wrapping with volunteers as she visits Northside Center for Child Development during her official two-day visit to the United States on December 8, 2014 in New York City (Getty)

Catherine, Duchess of Cambridge, leaves after attending the conservation reception at the British Consul General’s Residence on December 8, 2014 in New York City. The royal couple are on an official three-day visit to New York with Prince William also due to meet President Barack Obama in Washington D.C on Monday. (Photo by Carl Court/Getty Images)

Prince William, Duke of Cambridge (C) and Catherine, Duchess of Cambridge (2nd L) pose with NBA Commissioner Adam Silver (R) as they attend the Cleveland Cavaliers vs. Brooklyn Nets game at Barclays Center on December 8, 2014 in the Brooklyn borough of New York City. Prince William, Duke of Cambridge and Catherine, Duchess of are on their official two-day visit to the United States. (Photo by Neilson Barnard/Getty Images)

Prince William, Kate Middleton, & LeBron James, NYC, Dec. 9 (Getty)

Prince William, Kate Middleton, & LeBron James, NYC, Dec. 9 (Getty)

The Duchess of Cambridge visits the Northside Centre for Child Development in Harlem, New York City, USA, on December 8th, 2014 (SplashNews)

The Duchess of Cambridge visits the Northside Centre for Child Development in Harlem, New York City, USA, on December 8th, 2014 (SplashNews)

Kate Middleton & Chirlane McCray, Harlem, New York, Dec. 8, 2014 (SplashNews)

Kate Middleton & Chirlane McCray, Harlem, New York, Dec. 8, 2014 (SplashNews)

Kate Middleton & Chirlane McCray, Harlem, New York, Dec. 8, 2014 (SplashNews)

Kate Middleton in Harlem, New York on Dec. 8, 2014 (SplashNews)

The Duke and Duchess of Cambridge arrive for a Private Dinner hosted by the American Friends of the Duke and Duchess of Cambridge and Prince Harry on the first night of their visit to New York and Washington in New York, USA, on the 7th December 2014 (SplashNews)

The Duke and Duchess of Cambridge arrive for a Private Dinner hosted by the American Friends of the Duke and Duchess of Cambridge and Prince Harry on the first night of their visit to New York and Washington in New York, USA, on the 7th December 2014 (SplashNews)

The Duke and Duchess of Cambridge arrive for a Private Dinner hosted by the American Friends of the Duke and Duchess of Cambridge and Prince Harry on the first night of their visit to New York and Washington in New York, USA, on the 7th December 2014 (SplashNews)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge (L) arrive at The Carlyle Hotel, where they will be staying during their official two-day visit to the United States, on December 7, 2014 in New York City. (Photo by Neilson Barnard/Getty Images)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge (L) arrive at The Carlyle Hotel, where they will be staying during their official two-day visit to the United States, on December 7, 2014 in New York City. (Photo by Neilson Barnard/Getty Images)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge (L) arrive at The Carlyle Hotel, where they will be staying during their official two-day visit to the United States, on December 7, 2014 in New York City. (Photo by Neilson Barnard/Getty Images)

Catherine, Duchess of Cambridge arrives at The Carlyle Hotel, where they will be staying during their official two-day visit to the United States, on December 7, 2014 in New York City. (Photo by Samir Hussein/Pool/WireImage)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge (L) arrive at The Carlyle Hotel, where they will be staying during their official two-day visit to the United States, on December 7, 2014 in New York City. (Photo by Neilson Barnard/Getty Images)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge (L) arrive at The Carlyle Hotel, where they will be staying during their official two-day visit to the United States, on December 7, 2014 in New York City. (Photo by Neilson Barnard/Getty Images)

Catherine, Duchess of Cambridge visits an EACH (East Anglia Children’s Hospice) Appeal Launch Event at Norfolk Showground on November 25, 2014 in Norwich, England. (Photo by Chris Jackson/Entertainment/Getty Images)

Catherine, Duchess of Cambridge meets local school children as she visits an EACH (East Anglia Children’s Hospice) Appeal Launch Event at Norfolk Showground on November 25, 2014 in Norwich, England. (Photo by Chris Jackson/Entertainment/Getty Images)

Catherine, Duchess of Cambridge visits an EACH (East Anglia Children’s Hospice) Appeal Launch Event at Norfolk Showground on November 25, 2014 in Norwich, England. (Photo by Chris Jackson/Entertainment/Getty Images)

Catherine, Duchess of Cambridge visits an EACH (East Anglia Children’s Hospice) Appeal Launch Event at Norfolk Showground on November 25, 2014 in Norwich, England. (Photo by Chris Jackson/Entertainment/Getty Images)

Catherine, Duchess of Cambridge attends the Place2be Wellbeing in Schools Awards Reception at Kensington Palace on November 19, 2014 in London, England. (Photo by Paul Hackett/WPA Pool/Getty Images)

Catherine, Duchess of Cambridge attends the Place2be Wellbeing in Schools Awards Reception at Kensington Palace on November 19, 2014 in London, England. (Photo by Paul Hackett/WPA Pool/Getty Images)

Catherine, Duchess of Cambridge attends the Place2be Wellbeing in Schools Awards Reception at Kensington Palace on November 19, 2014 in London, England. (Photo by Paul Hackett/WPA Pool/Getty Images)

Catherine, Duchess of Cambridge attends the Place2be Wellbeing in Schools Awards Reception at Kensington Palace on November 19, 2014 in London, England. (Photo by Paul Hackett/WPA Pool/Getty Images)

Catherine, Duchess of Cambridge attends the Place2be Wellbeing in Schools Awards Reception at Kensington Palace on November 19, 2014 in London, England. (Photo by Paul Hackett/WPA Pool/Getty Images)

Kate Middleton meets One Direction at The Royal Variety Performance in London, UK, on November 13, 2014 (SplashNews)

Kate Middleton meets One Direction at The Royal Variety Performance in London, UK, on November 13, 2014 (SplashNews)

Catherine, Duchess of Cambridge attends The Royal Variety Performance at the London Palladium on November 13, 2014 in London, England. (Photo by Samir Hussein/WireImage)

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the The Royal Variety Performance at London Palladium on November 13, 2014 in London, England. (Photo by Danny Martindale/WireImage)

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the The Royal Variety Performance at London Palladium on November 13, 2014 in London, England. (Photo by Danny Martindale/WireImage)

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the The Royal Variety Performance at London Palladium on November 13, 2014 in London, England (Getty)

Kate Middleton at The Remembrance Sunday Service at The Cenotaph in London, UK, on November 6, 2014. (Splashnews)

Catherine, Duchess of Cambridge, Camilla, Duchess of Cornwall and Sophie, Countess of Wessex attend the annual Remembrance Sunday Service at the Cenotaph on Whitehall on November 9, 2014 in London, United Kingdom (Getty)

Catherine, Duchess of Cambridge attends the Action on Addiction Autumn Gala evening at L’Anima on October 23, 2014 in London, England. (Photo by Chris Jackson/Getty Images)

Catherine, Duchess of Cambridge attends the Action on Addiction Autumn Gala evening at L’Anima on October 23, 2014 in London, England. (Photo by Chris Jackson/Entertainment/Getty Images)

Kate Middleton attends the Wildlife Photographer of the Year Awards Ceremony at the Natural History Museum in London on October 21, 2014 (Getty, SplashNews)

Patron of The Natural History Museum, Catherine, Duchess of Cambridge presents the Young Wildlife Photographer of the Year award to Carlos Perez Naval at the Natural History Museum as she attends the Wildlife Photographer of The Year 2014 Awards Ceremony on October 21, 2014 in London, England. Her Royal Highness met the finalists, viewed the exhibition and joined Sir David Attenborough to present awards to the overall winners of the adult and under-18s competitions. (Photo by Arthur Edwards – WPA Pool/Entertainment/Getty Images)

Patron of The Natural History Museum, Catherine, Duchess of Cambridge presents the Young Wildlife Photographer of the Year award to Carlos Perez Naval at the Natural History Museum as she attends the Wildlife Photographer of The Year 2014 Awards Ceremony on October 21, 2014 in London, England. Her Royal Highness met the finalists, viewed the exhibition and joined Sir David Attenborough to present awards to the overall winners of the adult and under-18s competitions. (Photo by Arthur Edwards – WPA Pool/Entertainment/Getty Images)

Patron of The Natural History Museum, Catherine, Duchess of Cambridge wears Jenny Packham and presents the Young Wildlife Photographer of the Year award to Carlos Perez Naval at the Natural History Museum as she attends the Wildlife Photographer of The Year 2014 Awards Ceremony on October 21, 2014 in London, England. Her Royal Highness met the finalists, viewed the exhibition and joined Sir David Attenborough to present awards to the overall winners of the adult and under-18s competitions. (Photo by Arthur Edwards – WPA Pool/Entertainment/Getty Images)

Patron of The Natural History Museum, Catherine, Duchess of Cambridge presents the Young Wildlife Photographer of the Year award to Carlos Perez Naval at the Natural History Museum as she attends the Wildlife Photographer of The Year 2014 Awards Ceremony on October 21, 2014 in London, England. Her Royal Highness met the finalists, viewed the exhibition and joined Sir David Attenborough to present awards to the overall winners of the adult and under-18s competitions. (Photo by Arthur Edwards – WPA Pool/Entertainment/Getty Images)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge are seen as they welcome the President of Singapore Tony Tan Keng Yam (not seen) at the Royal Garden Hotel on October 21, 2014 in London, England. (Photo by Chris Jackson/Entertainment/Getty Images)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge greet the President of Singapore Tony Tan Keng Yam (not seen) and his wife Mary Chee Bee Kiang (not seen) at the Royal Garden Hotel on the first of a four day state visit to the UK on October 21, 2014 in London, England. (Photo by Anthony Devlin – WPA Pool/News/Getty Images)

(L-R) Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge, President of Singapore Tony Tan Keng Yam and his wife Mary Chee Bee Kiang pose for a photo at the Royal Garden Hotel on the first of a four day state visit to the UK on October 21, 2014 in London, England. (Photo by Anthony Devlin – WPA Pool/News/Getty Images)

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge arrive at Buckingham Palace during a state visit by the President of Singapore Tony Tan Keng Yam on October 21, 2014 in London, England. The Duchess is currently four months pregnant with her second child and along with her husband, Prince William, Duke of Cambridge met the Singaporean President at the start of his four day stay in the UK. (Photo by Carl Court – WPA Pool/News/Getty Images)

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit The Tower Of London’s Ceramic Poppy installation ‘Blood Swept Lands and Seas of Red’ by artist Paul Cummins, commemortating the 100th anniversary of the outbreak of First World War on August 5, 2014 in London, England. (Photo by Samir Hussein/WireImage)

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit The Tower Of London’s Ceramic Poppy installation ‘Blood Swept Lands and Seas of Red’ by artist Paul Cummins, commemortating the 100th anniversary of the outbreak of First World War on August 5, 2014 in London, England. (Photo by Samir Hussein/WireImage)

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit The Tower Of London’s Ceramic Poppy installation ‘Blood Swept Lands and Seas of Red’ by artist Paul Cummins, commemortating the 100th anniversary of the outbreak of First World War on August 5, 2014 in London, England. (Photo by Samir Hussein/WireImage)

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit The Tower Of London’s Ceramic Poppy installation ‘Blood Swept Lands and Seas of Red’ by artist Paul Cummins, commemortating the 100th anniversary of the outbreak of First World War on August 5, 2014 in London, England. (Photo by Samir Hussein/WireImage)

Prince William & Kate Middleton attend a WW1 100 Years Commemoration Ceremony at Le Memorial Interallie on August 4, 2014 in Liege, Belgium. (Photo by Chris Jackson/Getty Images)

Prince William & Kate Middleton attend a WW1 100 Years Commemoration Ceremony at Le Memorial Interallie on August 4, 2014 in Liege, Belgium. (Photo by Chris Jackson/Getty Images)

Prince William & Kate Middleton attend a WW1 100 Years Commemoration Ceremony at Le Memorial Interallie on August 4, 2014 in Liege, Belgium. (Photo by Chris Jackson/Getty Images)

Prince William & Kate Middleton attend a WW1 100 Years Commemoration Ceremony at Le Memorial Interallie on August 4, 2014 in Liege, Belgium. (Photo by Chris Jackson/Getty Images)

Prince William & Kate Middleton attend a WW1 100 Years Commemoration Ceremony at Le Memorial Interallie on August 4, 2014 in Liege, Belgium. (Photo by Chris Jackson/Getty Images)

Kate Middleton (Getty)

Kate Middleton on July 29, 2014 (Getty)

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge watch Scotland Play Wales at Hockey at the Glasgow National Hockey Centre during the 20th Commonwealth games on July 28, 2014 in Glasgow, Scotland. (Photo by Chris Jackson/Getty Images)

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge watch Scotland Play Wales at Hockey at the Glasgow National Hockey Centre during the 20th Commonwealth games on July 28, 2014 in Glasgow, Scotland. (Photo by Chris Jackson/Getty Images)

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge watch Scotland Play Wales at Hockey at the Glasgow National Hockey Centre during the 20th Commonwealth games on July 28, 2014 in Glasgow, Scotland. (Photo by Chris Jackson/Getty Images)

Catherine, Duchess of Cambridge attends the gymnastics during the Commonwealth Games on July 28, 2014 in Glasgow, Scotland. (Photo by Karwai Tang/WireImage)

Kate Middleton and Prince William pictured in the Royal Box for the Gentleman’s single final at the 2014 Wimbledon Tennis Championships in London, England on Sunday 6th July 2014 (SplashNews)

Kate Middleton pictured in the Royal Box for the Gentleman’s single final at the 2014 Wimbledon Tennis Championships in London, England on Sunday 6th July 2014 (SplashNews)

Kate Middleton and Prince William pictured in the Royal Box for the Gentleman’s single final at the 2014 Wimbledon Tennis Championships in London, England on Sunday 6th July 2014 (SplashNews)

Kate Middleton of the Wimbledon Championships at Wimbledon on July 2, 2014 in London, England. (Getty)

Kate Middleton of the Wimbledon Championships at Wimbledon on July 2, 2014 in London, England. (Getty)

Kate Middleton of the Wimbledon Championships at Wimbledon on July 2, 2014 in London, England. (SplashNews)

Kate Middleton of the Wimbledon Championships at Wimbledon on July 2, 2014 in London, England. (SplashNews)

Kate Middleton of Cambridge visits an M-PACT Plus Counselling programme at Blessed Sacrament School on July 1, 2014 in London, England wearing a dress by Goatscarlett. (Getty)

Kate Middleton of Cambridge visits an M-PACT Plus Counselling programme at Blessed Sacrament School on July 1, 2014 in London, England. (Getty)

Kate Middleton of Cambridge visits an M-PACT Plus Counselling programme at Blessed Sacrament School on July 1, 2014 in London, England. (Getty)

Kate Middleton of Cambridge visits an M-PACT Plus Counselling programme at Blessed Sacrament School on July 1, 2014 in London, England. (Getty/FameFlyNet)

Kate Middleton of Cambridge visits an M-PACT Plus Counselling programme at Blessed Sacrament School on July 1, 2014 in London, England. (Getty)

Kate Middleton of Cambridge visits an M-PACT Plus Counselling programme at Blessed Sacrament School on July 1, 2014 in London, England. (FameFlyNet)

Kate Middleton Cambridge visits an M-PACT Plus Counselling programme at Blessed Sacrament School on July 1, 2014 in London, England. (Getty)

Kate Middleton Cambridge visits an M-PACT Plus Counselling programme at Blessed Sacrament School on July 1, 2014 in London, England. (Getty)

Catherine, Duchess of Cambridge on the balcony during during Trooping the Colour – Queen Elizabeth II’s Birthday Parade, at The Royal Horseguards on June 14, 2014 in London, England. (Photo by Chris Jackson/Getty Images)

Prince Harry, Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge on the balcony during Trooping the Colour – Queen Elizabeth II’s Birthday Parade, at The Royal Horseguards on June 14, 2014 in London, England. (Photo by Chris Jackson/Getty Images)

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge on the balcony during Trooping the Colour – Queen Elizabeth II’s Birthday Parade, at The Royal Horseguards on June 14, 2014 in London, England. (Photo by Chris Jackson/Getty Images)

Prince Harry, Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge on the balcony during Trooping the Colour – Queen Elizabeth II’s Birthday Parade, at The Royal Horseguards on June 14, 2014 in London, England. (Photo by Chris Jackson/Getty Images)

Prince Harry, Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge on the balcony during Trooping the Colour – Queen Elizabeth II’s Birthday Parade, at The Royal Horseguards on June 14, 2014 in London, England. (Photo by Chris Jackson/Getty Images)

Prince William, Duke of Cambridge arrives for Trooping the Colour at The Royal Horseguards on June 14, 2014 in London, England. (Photo by Stuart C. Wilson/Getty Images)

Trooping the Colour at The Royal Horseguards on June 14, 2014 in London, England. (Photo by Stuart C. Wilson/Getty Images)

Queen Elizabeth II and Prince Phillip, Duke Of Edinburgh arrive at Horseguards Parade during Trooping the Colour at The Royal Horseguards on June 14, 2014 in London, England. (Photo by Stuart C. Wilson/Getty Images)

Queen Elizabeth II arrives at Horseguards Parade during Trooping the Colour at The Royal Horseguards on June 14, 2014 in London, England. (Photo by Stuart C. Wilson/Getty Images)

Anne, Princess Royal and Catherine, Duchess of Cambridge talk during a garden party held at Buckingham Palace on June 10, 2014 in London, England. (Photo by John Stillwell – WPA Pool / Getty Images)

Duchess of Cambridge, in Alexander McQueen, talk during a garden party held at Buckingham Palace on June 10, 2014 in London, England. (Photo by John Stillwell – WPA Pool / Getty Images)

Kate Middleton receives flowers from a young girl at the National Maritime Museum in Greenwich for the Ben Ainslie America’s Cup Launch on June 10, 2014 in London, England. (SplashNews)

Kate Middleton receives flowers from a young girl at the National Maritime Museum in Greenwich for the Ben Ainslie America’s Cup Launch on June 10, 2014 in London, England. (SplashNews)

Kate Middleton poses next to the America’s Cup as she visits the National Maritime Museum in Greenwich for the Ben Ainslie America’s Cup Launch on June 10, 2014 in London, England. (Photo by Chris Jackson/Getty Images)

Kate Middleton poses next to the America’s Cup as she visits the National Maritime Museum in Greenwich for the Ben Ainslie America’s Cup Launch on June 10, 2014 in London, England. (SplashNews)

Kate Middleton poses next to the America’s Cup as she visits the National Maritime Museum in Greenwich for the Ben Ainslie America’s Cup Launch on June 10, 2014 in London, England. (Photo by Chris Jackson/Getty Images)

Kate Middleton poses next to the America’s Cup as she visits the National Maritime Museum in Greenwich for the Ben Ainslie America’s Cup Launch on June 10, 2014 in London, England. (Photo by Chris Jackson/Getty Images)

Kate Middleton poses next to the America’s Cup as she visits the National Maritime Museum in Greenwich for the Ben Ainslie America’s Cup Launch on June 10, 2014 in London, England. (Photo by Chris Jackson/Getty Images)

Kate Middleton poses next to the America’s Cup as she visits the National Maritime Museum in Greenwich for the Ben Ainslie America’s Cup Launch on June 10, 2014 in London, England. (Photo by Chris Jackson/Getty Images)

Kate Middleton poses next to the America’s Cup as she visits the National Maritime Museum in Greenwich for the Ben Ainslie America’s Cup Launch on June 10, 2014 in London, England. (Photo by Chris Jackson/Getty Images)

Kate Middleton poses next to the America’s Cup as she visits the National Maritime Museum in Greenwich for the Ben Ainslie America’s Cup Launch on June 10, 2014 in London, England. (Photo by Chris Jackson/Getty Images)

Kate Middleton poses next to the America’s Cup as she visits the National Maritime Museum in Greenwich for the Ben Ainslie America’s Cup Launch on June 10, 2014 in London, England. (FameFlyNet)

Kate Middleton poses next to the America’s Cup as she visits the National Maritime Museum in Greenwich for the Ben Ainslie America’s Cup Launch on June 10, 2014 in London, England. (Photo by Chris Jackson/Getty Images)

Kate Middleton poses next to the America’s Cup as she visits the National Maritime Museum in Greenwich for the Ben Ainslie America’s Cup Launch on June 10, 2014 in London, England. (Photo by Chris Jackson/Getty Images)

Kate Middleton poses next to the America’s Cup as she visits the National Maritime Museum in Greenwich for the Ben Ainslie America’s Cup Launch on June 10, 2014 in London, England. (Photo by Chris Jackson/Getty Images)

The Duke and Duchess of Cambridge attend the Commemoration of the 70th anniversary of the Normandy Landings at Gold Beach, Arromanches, Normandy, France, on the 6th June 2014
(Splashnews)

The Duke and Duchess of Cambridge attend the Commemoration of the 70th anniversary of the Normandy Landings at Gold Beach, Arromanches, Normandy, France, on the 6th June 2014
(Splashnews)

Kate Middleton greets fans at MacRostyy Park on May 29, 2014 in Crieff, Scotland. (Getty)

Kate Middleton, in Jonathan Saunders, greets fans at MacRostyy Park on May 29, 2014 in Crieff, Scotland. (Getty)

Kate Middleton greets fans at MacRostyy Park on May 29, 2014 in Crieff, Scotland. (Getty)

Kate Middleton greets fans at MacRostyy Park on May 29, 2014 in Crieff, Scotland. (Getty)

The Duke and Duchess of Cambridge and Prince Harry attend the wedding of close friends, Lucy Meade and Charlie Budgett at St Mary’s Church, Marshfield, Gloucestershire on March 29, 2014 (SplashNews)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive for the Christmas Day service at Sandringham on December 25, 2013 in King’s Lynn, England. (Photo by Chris Jackson/Entertainment/Getty Images)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive for the Christmas Day service at Sandringham on December 25, 2013 in King’s Lynn, England. (Photo by Chris Jackson/Entertainment/Getty Images)

Prince William, Duke of Cambridge & Catherine, Duchess of Cambridge carries son Prince George Of Cambridge in the Chapel Royal during the christening with Archbishop of Canterbury, Justin Welby in St James’s Palace, on October 23, 2013 in London, England. (Photo by John Stillwell – WPA Pool /Getty Images)

SEPTEMBER 12: Prince William, Duke of Cambridge and Cathrine, Duchess of Cambridge leave The Royal Society after attending The Tusk Conservation Awards. on September 12, 2013 in London, England. (Getty)

Kate Middleton attends a screening at the Museum Of Natural History in London Dec. 11, 2013 (SplashNews)

Kate Middleton attends the Royal film performance of ‘Mandela: Long Walk To Freedom’ Dec 5, 2013 (Fameflynet)

Kate Middleton attends the Royal film performance of ‘Mandela: Long Walk To Freedom’ Dec 5, 2013 (Fameflynet)

Kate Middleton arrives at the Sportsball 2013, a fundraiser to provide support to promising young athletes held at Supernova, London on Nov. 28 (Bauer-Griffin)

Kate Middleton arrives at the Place2B’s Schools Forum in Canary, UK on Nov. 20, 2013(Fameflynet)

Kate Middleton visiting the Only Connect head office in London, UK on Nov. 19, 2013.(Fameflynet)

Catherine, Duchess of Cambridge prepares to meet staff and volunteers from The Royal British Legion’s London Poppy Day Appeal at Kensington Palace on November 07, 2013 in London, England. (Photo by Carl Court – Pool/Getty Images)

Catherine, Duchess of Cambridge in an Alexander McQueen ensemble carries her son Prince George Of Cambridge after his christening at the Chapel Royal in St James’s Palace on October 23, 2013 in London, England. (John Stillwell/Entertainment/Getty)

Kate Middleton, Prince George & Prince William (Getty)

Kate Middleton, Prince George & Prince William (Getty)

Kate Middleton of Cambridge attends a Sportaid Athlete Workshop at the Copper Box on October 18, 2013 in London, England. (Getty)

Kate Middleton attends a Sportaid Athlete Workshop Oct. 18, 2013 in London, England. (Getty)

Kate Middleton of Cambridge attends a Sportaid Athlete Workshop at the Copper Box on October 18, 2013 in London, England. (Getty)

Kate Middleton of Cambridge attends a Sportaid Athlete Workshop at the Copper Box on October 18, 2013 in London, England. (Getty)

Kate Middleton of Cambridge attends a Sportaid Athlete Workshop at the Copper Box on October 18, 2013 in London, England. (Getty)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Tusk Trust Conservation Awards at The Royal Society on September 12, 2013 in London, England wearing a Jenny Packham gown. (Getty)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Tusk Trust Conservation Awards at The Royal Society on September 12, 2013 in London, England wearing a Jenny Packham gown. (Getty)

Catherine, Duchess of Cambridge attends the start of the Ring O’Fire Anglesey Costal Ultra Marathon on August 30, 2013 in Holyhead, Wales. (Getty)

Catherine, Duchess of Cambridge attends the start of the Ring O’Fire Anglesey Costal Ultra Marathon on August 30, 2013 in Holyhead, Wales. (Getty

Kate Middleton out shopping at Waitrose in Anglesey, Wales on August 27, 2013. (Bauer-Griffin)

Kate Middleton out shopping at Waitrose in Anglesey, Wales on August 27, 2013. (Bauer-Griffin)

Kate Middleton out shopping at Waitrose in Anglesey, Wales on August 27, 2013. (Bauer-Griffin)

The Duke and Duchess of Cambridge leave the Lindo Wing of St Mary’s Hospital in London, with their newborn son (Getty)

The Duke and Duchess of Cambridge leave the Lindo Wing of St Mary’s Hospital in London, with their newborn son (Getty)

July 2013: 9 months and in the home stretch! (FameFlyNet)

June 2013: Kate’s dalmation spotted coat so chic at 8 months! (FameFlyNet)

Kate Middelton talks to guests as she attends a Garden Party in the grounds of Buckingham Palace hosted by Queen Elizabeth II on May 22, 2013. (Getty)

April 2013: Kate’s coordinating jacket/dress combo was perfect for showcasing her mama-to-be style at a trip to Naomi House Children’s Hospice. (SplashNews)

April 2013: As the weather warms up, Kate steps out in a form-fitting dress that shows off her bump.(SplashNews)

April 2013: An empire waisted dress emphasizes the 6-month bump. (Bauer-Griffin)

April 2013: Kate’s bump becomes more obvious at the National Review of the Queen's Scouts. (Bauer-Griffin)

April 2013: 6 months along and as chic as can be in Glasgow. (FameFlyNet)

April 2013; The nearly 7 month bump was spotted in Warford! (FameFlyNet)

March 2013: Bundling up her 5-month bump in Switzerland. (Bauer-Griffin)

March 2013: Kate reveals that her bundle of joy is kicking up a storm! (FameFlyNet)

March 2013: Planning her baby shower with sister Pippa! (FameFlyNet)

February 2013: 4 1/2 months along and her belly grows ever so slightly! (Getty)

Kate Middleton visits the Fishing Heritage Centre during an official visit to Grimsby, England on March 5, 2013. (FameFlynet)

February 2013: Unbelievably tiny at 4 1/2 months, Kate attended a charity event after her leaked photos of her bare baby bump were released. (FameFlyNet)

January 2013: Kate was experiencing acute morning sickness. (FameFlyNet)

Katy Perry and John Mayer (Larry Busacca/Entertainment/Getty Images)