- Oct 1 James Whitmore, American actor (The Shawshank Redemption, Give 'em Hell Harry), born in White Plains, New York (d. 2009)
- Oct 9 Michel Boisrond, French film director and screenwriter, born in Châteauneuf-en-Thymerais, France (d. 2002)
- Oct 10 James Clavell, British-American novelist (Tai-Pan; Shogun; Noble House; King Rat), screenwriter (The Fly; The Great Escape), and film director (King Rat; To Sir, with Love), born in Sydney, Australia (d. 1994)
- Oct 13 Harper MacKay, American orchestra leader (NBC Follies), born in Boston, Massachusetts (d. 1995)
- Oct 13 Yves Montand [Ivo Livi], Italian-French actor and singer (Z, Napoleon, Grand Prix), born in Monsummano Terme, Italy (d. 1991)
- Oct 16 Michael Conrad, American Emmy Award-winning actor (Hill Street Blues - "Sgt. Phil Esterhaus"), born in New York City (d. 1983)
- Oct 17 Tom Poston, American actor (Newhart - "George Utley"; Mork & Mindy - "Franklin Bickley"; The Bob Newhart Show; The Steve Allen Show), born in Columbus, Ohio (d. 2007)
- Oct 19 George Nader, American actor (Robot Monster, Away All Boats), born in Pasadena, California (d. 2002)
- Oct 21 Sir Malcolm Arnold, British trumpeter, and classical and film score composer (The Bridge On The River Kwai), born in Northampton, England (d. 2006)
- Oct 29 Edward "Ed" Kemmer, American actor (Space Patrol, Lux Video Theatre), born in Reading, Pennsylvania (d. 2004)
About October 1921
How Old? 102 years old
Generation: Greatest Generation
Leap Year: No
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