Larry Martin Hagman (September 21, 1931 – November 23, 2012) was an American film and television actor, director and producer best known for playing ruthless oil baron J.R. Ewing in the 1978-91 primetime television soap opera Dallas and befuddled astronaut Major Anthony "Tony" Nelson in the 1965-70 sitcom I Dream of Jeannie. Hagman had supporting roles in numerous films, including Fail-Safe, Harry and Tonto, S.O.B., Nixon and Primary Colors. His television appearances also included guest roles on dozens of shows spanning from the late 1950s until his death and a reprise of his signature role on the 2012 revival of Dallas. Hagman also worked as a television producer and director. He was the son of actress Mary Martin. Hagman underwent a life-saving liver transplant in 1995. He died on November 23, 2012, from complications of acute myeloid leukemia.