Some stars wait until their 40s to start families. But others like to get a head start on baby making in their early 20s. In honor of Hilary Duff's 25th birthday on Sept. 28, Wonderwall rounds up Hollywood's hottest young moms. Let's click through to wish the Duffster a very HBD!
The former Disney star and multiplatinum-selling recording artist and her hubby, Mike Comrie, welcomed their first child, Luca Cruz Comrie, on March 20, 2012, when Hilary was a mere 24 years old. "We are overjoyed and feel like the luckiest parents in the world," she tweeted when little Luca was born.