Happy Birthday, Penny Lancaster! You're 40 Today, March 15!

New mommy Penny is celebrating a milestone birthday today! The big 4-0 — what a year!

This 5’11″ beauty might be a former model, but Penny Lancaster is best known for being the current wife of musician, Rod Stewart, 66. The couple just welcomed their second child together, a baby boy named Aiden, who joins big brother Alastair, 5. But, Aiden has six half-siblings as well!

“I’ll never quite understand how mothers manage to do it,” Rod says of his wife. “She hasn’t had much sleep since little Aiden was born. She had two half-hour naps in the middle of the night last night. They just wake up and want feeding and comforting. But it is so amazing, because I hold him and he shouts.”

“So I said to Penny, ‘Why is he peaceful when you hold him?’ She said, ‘Well, he can smell the food and he knows my voice and the touch of my skin.’ So I take my hat off to mothers and especially my Penny.” Aww!

Well, we hope Penny and the whole family have a wonderful day of 40th birthday celebrations.

Hey moms, want to know what today has in store for you? Click on your sign below for your momscope. Astrology.com has all the details!