Diane Keaton and Michael Keaton Family Trees Compared: Genealogies, Birth Names, and True Origins

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Q1: Are Diane Keaton and Michael Keaton related in any way?
No. Diane Keaton and Michael Keaton share no blood relation or family ties. Diane took the maiden name of her mother, Dorothy Keaton, while Michael selected the surname from an alphabetical directory to satisfy union registration requirements.

Q2: Why couldn't Michael Keaton use his real name?
Michael Keaton's birth name is Michael John Douglas. When he registered with the Screen Actors Guild in the 1970s, actor Michael Douglas (star of *Wall Street*) and television host Mike Douglas were already active members. Guild rules prohibit duplicate working names to avoid payment and credit disputes.

Q3: Is either actor related to Buster Keaton?
Neither actor is related to Buster Keaton. Buster was born Joseph Frank Keaton in Kansas to a vaudeville family. Any suggestion of a shared family lineage between the three performers is an urban myth.

Q4: What was Diane Keaton's real name?
She was born Diane Hall in Los Angeles, California. Her parents were Jack Hall and Dorothy Keaton. Woody Allen used her actual birth surname when creating the title character for the 1977 film *Annie Hall*.