- Sep 3 Harry Landers [Sorokin], American actor (Star Trek, Ben Casey, Drive a Crooked Road), born in New York City (d. 2017)
- Sep 5 Jack Valenti, American political advisor and film executive, born in Houston, Texas (d. 2007)
- Sep 8 Harry Secombe, Welsh actor, comedian, singer and goon (The Goon Show; Oliver!), born in Swansea, Wales (d. 2001)
- Sep 11 Edwin Richfield, British actor (Interpol Calling, The Avengers), born in London England (d. 1990)
- Sep 12 Frank McGee, American news anchor (NBC Evening News), born in Monroe, Louisiana (d. 1974)
- Sep 14 Hughes Rudd, American news anchor (CBS Morning News), born in Waco, Texas (d. 1992)
- Sep 15 Norma MacMillan, Canadian voice actress (Casper the Ghost), born in Vancouver (d. 2001)
- Sep 20 Melvin "Slappy" White, American comedian and actor, born in Baltimore, Maryland (d. 1995)
- Sep 24 Jim McKay, American sportscaster (ABC's Wide World of Sports; American Sportscasters Association HOF), born in Philadelphia, Pennsylvania (d. 2008)
- Sep 24 Leonard Salzedo, British orchestral, ballet, and film composer (The Witch Boy; Requiem Sine Voxibus, Hammer Films), born in London, England (d. 2000)
- Sep 30 Deborah Kerr, American actress (The King & I, Night of Iguana), born in Helensburg Scotland (d. 2007)
About September 1921
How Old? 102 years old
Generation: Greatest Generation
Leap Year: No
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