All Grown Up: Child Star Baby Boom

Tia Mowry! Anna Paquin! Hilary Duff! See which famous faces have transitioned from tween idols to proud parents

MAYIM BIALIK

Talk about Blossom–ing into motherhood! Before playing nerdy Amy on The Big Bang Theory, the actress, 36, starred as spunky teen Blossom Russo from 1991 to 1995. Now, she's mom to two boys – Miles, 6, and Fred, 3 – and author of a parenting book, Beyond the Sling, which details her unconventional child-rearing methods, including breastfeeding her 3-year-old.