Pregnant Hilary Duff Pictures

Congrats to Hilary Duff and hockey star hubby Mike Comrie, who welcomed their baby boy into the world on March 20! Hilary Duff tweeted her baby news earlier today, writing, "Welcome to the World Luca Cruz Comrie! Tuesday evening, we became proud parents of a healthy 7 pound 6 ounce beautiful boy." She later added that, "He is surrounded by so much love!! Mom and baby are both doing extremely well. We are overjoyed and feel like the luckiest parents in the world."

In honor of baby Luca's arrival, we're taking a look back at Hilary's nine months of maternity style. The 24-year-old mom didn't allow pregnancy to slow down her youthful look, sporting looks that showcased her curves and accented her assets throughout the entire time she was expecting.

Source: Getty, Bauer-Griffin Online