The son of Mariska Hargitay turns five today. And he just became a big brother!

Born on June 28, 2006, August, the son of Mariska Hargitay and Peter Hermann, who met on the set of Law and Order: SVU, is best friends with two other celebrity tots: Debra Messing‘s son, Roman and Hugh Jackman‘s daughter Ava!

Recently, August became a big brother when his parents adopted little sister Amaya Josephine in April.

“I pride myself on being August’s mom,” Mariska has said. “I think having a baby, especially one that’s happy, levels the playing field. Regardless of our career, when it comes to being parents, we share the same profession. We are all in it together. I am always so grateful for all the moms I meet that are willing to share information. No matter how fancy our job or what people project onto you, all of a sudden you’re just a mommy and I love that.”

We hope August and his family have a great time celebrating today!

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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!

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HollyMoms Mariska Hargitay and Debra Messing were spotted hanging out in Disneyland last week with their sons!

The two TV stars checked out Disneyland‘s newest attraction: Ariel’s Undersea Adventure. Debra brought her son Roman, 7, and new mommy Mariska brought son August, 4 1/2. They look like best buddies!

We didn’t even know these two were friends! It’s always cool to see stars hanging out together, don’t you think?

More on HollyBaby:

1. The Jackmans Have A Play Date With The Hargitays!
2. Mariska Hargitay Has Adopted A Baby Girl! Amazing News!
3. Family Turns Their Backyard Into A Mini Magic Kingdom!

Buddies Ava and August got to hang out with the Jackman family pooch, Dali, and Mariska’s new daughter, Amaya!

Mariska Hargitay, 47, met up with her friend Hugh Jackman, 42, in New York City Sunday, April 10, to introduce the famous dad to her new baby, Amaya Josephine, who she adopted from Texas last week. Not to forget that Ava, 5, and Mariska‘s son August,4 ½, are best buds too!

Hugh has two adopted children himself, Ava and her big brother Oscar, 11, so the celebrity friends definitely have something exciting to bond over!

While Mariska and her husband Peter Hermann chatted away with Hugh’s wife Deborra-Lee Furness, Hugh took Ava and August for a walk with the family pup, Dali!

It looks like both broods had a wonderful Sunday together in NYC. We hope they enjoyed the weekend weather!

–Leigh Blickley

GET MORE:

1. Mariska Hargitay Has Adopted A Baby Girl! Amazing News!
2. Check Out These Cute Celeb Kid Siblings! You Can’t Have One Without The Other!
3. Hugh Jackman’s A Superhero Dad—Look At The Size Of That Snowball!