Doc Holliday is a character in the American Western film Tombstone (1993). Although portrayed by Val Kilmer in the movie, he was actually a real person in history. In the mid 1800s, Doc was an actual cowboy, gunman, and gambler, as well as close friend and associate of lawman Wyatt Earp. He played a significant role in the Gunfight at the O.K. Corral, developing a reputation of killing more than a dozen men in his altercations.