Hilary Duff and her husband, former professional hockey player Mike Comrie, just announced the birth of their first child—and it's a boy! "Welcome to the World Luca Cruz Comrie!" Duff tweeted. "Tuesday evening, we became proud parents of a healthy 7 pound 6 ounce beautiful boy." The new mom then added, "We are overjoyed and feel like the luckiest parents in the world." Congratulations to the happy family!