TMZ reports that Lee Thompson Young, the actor who starred on Disney's The Famous Jett Jackson, has died at age 29. Their sources say Young was discovered in his L.A. home, with what is being considered a self-inflicted gunshot wound. He was supposed to be filming Rizzoli & Isles, but when he didn't show up to set, the producers had his landlord check on him. Young played Jett Jackson for three seasons, 65 episodes, and a movie. He had been a series regular on Rizzoli & Isles since its first season.