Hilary Duff and husband Mike Comrie. (Matt Sayles/AP)

The 24-year-old actress and author, perhaps best known for starring on Disney’s “Lizzie McGuire,”and her husband Mike Comrie welcomed a son Tuesday.

“Welcome to the World Luca Cruz Comrie! Tuesday evening, we became proud parents of a healthy 7 pound 6 ounce beautiful boy,” Duff tweeted Thursday. “We are overjoyed and feel like the luckiest parents in the world. He is surrounded by so much love!! Mom and baby are both doing extremely well.”

Duff and Comrie, a 31-year-old retired hockey player, wed in August 2010. The couple announced the pregnancy a year later.

View Photo Gallery: With so many stars sporting baby bumps this year, the stork is working overtime in Hollywood. Here are the celebrities who have recently welcomed children or are expecting.