Like a true former 'tween star, Hilary Duff broke the news of her pregnancy on Facebook yesterday. The 23-year-old actress and singer married Canadian hockey player Mike Comrie, 30, last year. Not even the most devoted Lizzie McGuire fans could have predicted this one, as Duff said in an interview recently that the couple wanted to wait to have kids. "We are extremely happy and ready to start this new chapter of our lives," she wrote on Facebook. Hilary Duff joins the growing list of expecting starlets, including Alyssa Milano, January Jones, and Tori Spelling. Jessica Alba and Tina Fey each had their second babies—both girls—last week.