American actor well known for his roles as astronaut Tony Nelson in I Dream of Jeannie and as the evil oil baron J.R. Ewing on Dallas. In 2012, Dallas was revived by TNT and Hagman returned to his signature role.
He worked as a ranch hand for a family friend when he was young.
His first role was in the film Ensign Pulver, which featured Jack Nicholson.
He was the son of actress Mary Martin. He married Maj Axelsson in 1954, and the couple had a daughter in 1958.
He was the son of actress and Broadway star, Mary Martin.