Birth name: Michael John Douglas
Interesting trivia: Keaton (Beatlejuice, Batman) decided to use an alternative surname to avoid confusion with well-known actor Michael Douglas (Wall Street, Fatal Attraction) and daytime host Mike Douglas as well, to satisfy Screen Actors Guild rules, according to biography.com. The rumor that Keaton changed his surname because of an attraction for actress Diane Keaton is a fallacy. He chose Keaton because of an affinity for the physical comedic genius of Buster Keaton.
