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

MELISSA JOAN HART

Before becoming a busy mom to sons Braydon, 4, and Mason, 6, Hart starred as insightful teen Clarissa Darling on Clarissa Explains It All and Sabrina Sawyer on Sabrina the Teenage Witch. Now, the actress, 36, is expecting her third child with hubby Mark Wilkerson. "(Early) Happy Birthday to me! And baby makes 3!" she Tweeted April 17.