1951 (MCMLI) was a common year starting on a Monday.
| Date | Event(s) | |
|---|---|---|
| February 5 | Birth of Robin Sachs, the voice of Sergeant Sam Roderick. | |
| July 4 | Birth of Frank Weiss, the former animation director of SpongeBob SquarePants and Celia's husband. | |
| July 21 | Birth of Robin Williams, guest star in Truth or Square. | |
| September 12 | Birth of Joe Pantoliano, the voice of Stickyfins Whiting. | |
| September 25 | Birth of Mark Hamill, the voice of The Moth. | |
| November 20 | Birth of Rodger Bumpass, the voice of Squidward Tentacles. | |
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