No, they are not related. Zero blood ties. No secret cousins, no shared grandparents hiding in a dusty family album. Michael Keaton was born Michael John Douglas, and Diane Keaton was born Diane Hall.
Which means the universe just decided to play a little joke on us by giving them the same stage surname. Classic Hollywood chaos.
Why They Both Chose “Keaton”
Here’s where it gets juicy. Michael picked “Keaton” because he admired the silent-film star Buster Keaton. He thought it sounded cool and professional—and honestly? He was right.
Diane, on the other hand, took her mother’s maiden name, Keaton, when she started acting. So both of them arrived at the same last name from completely different directions. Freaky, right?
I mean, imagine the confusion at award shows. “And the winner is… Keaton!” two people stand up. That’s a sitcom plot waiting to happen. And yet, they’ve never even worked together in a major film. What a waste of comedic potential.
