With 4-month-old twin sons Sullivan and Darby joining the household, Dempsey, 41, makes sure he spends extra one-on-one time with 5-year-old Talula. Besides bonding over biking, the Grey's Anatomy star is encouraging another shared passion. "Talula already wants to drive," the part-time racecar driver said. "She likes my silver Mercedes with the red interior. I'm glad because it's a sedan so the whole family can ride with her when she learns to drive."