Actor Michael Keaton took last name Keaton to avoid confusion with what other famous Michael? An
Michael Keaton, whose real name is Michael John Douglas, had to choose a pseudonym when he began his acting career in the late 1970s. This change was a requirement by the Screen Actors Guild, which prohibits two members from having the same professional name to avoid legal and administrative confusion. The name “Michael Douglas” was already registered by the famous actor who would go on to win Oscars for “Wall Street” and “One Flew Over the Cuckoo’s Nest.”
Source:
https://www.youtube.com/watch?v=hj3fiMvkmDA
https://www.threads.com/@beliproduk.official/post/DS03wEYkkJV
Kompasiana : Too many Actor using Michael as name, this actor change his name