- He asked for a divorce from his second wife after 36 hours.
- Was Garry Marshall's original choice to play the character of Mork on Happy Days (1974), but he turned it down. The part then went to Robin Williams, and soon spun off into the show Mork & Mindy (1978).
- Was known for doing every voice (except one) in all 17 The Ant and the Aardvark (1969) cartoons.
- Biography in: "Who's Who in Comedy" by Ronald L. Smith. Pg. 82-83. New York: Facts on File, 1992. ISBN 0816023387
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