Melissa Gilbert, 46, and Bruce Boxleitner, 60, have officially separated after a turbulent 16-year marriage. They were wed in 1995 and have a 15-year-old son, Michael, named for Michael Landon, Gilbert’s Little House on the Prairie co-star. Gilbert also has a 21-year-old son from her first marriage and Boxleitner has two sons from his first marriage. He most recently appeared on the big screen in Tron: Legacy.