Mariska Hargitay's Son's Birthday Bash

Mariska Hargitay‘s son, August, who just turned one on Thursday, celebrated his birthday with a party in Central Park on Sunday afternoon. (August visited mommy on set the day after his actual birthday.)

The Law & Order: SVU star and her actor hubby Peter Hermann gathered friends on a lawn in Central Park near the 72nd Street entrance to celebrate. There were balloons, clowns, bubble-blowing and lots more! Actress pal Debra Messing and her son 3-year-old Roman were among guests.

Check out mommy Mariska dancing and entertaining her son while daddy Peter held him high in the air with one hand!

HAPPY BIRTHDAY, BABY AUGUST!

10+ pictures inside of baby August partying…