- Mar 1 Jack Clayton, English film director (The Great Gatsby), born in Brighton, England (d. 1995)
- Mar 2 Norman T. Hatch, American oscar-winning marine cinematographer during WWII (With the Marines at Tarawa), born in Boston (d. 2017)
- Mar 2 Robert Simpson, British classical composer, and broadcaster (BBC), born in Leamington, Warwickshire, England (d. 1997)
- Mar 3 Diana Barrymore, American actress (Nightmare, Lady Courageous, Fired Wife), born in New York City (d. 1960)
- Mar 4 Joan Greenwood, British actress and director (Kind Hearts and Coronets, Amorous Mr Prawn), born in London, England (d. 1987)
- Mar 6 Ross Hunter, American film producer (Airport, Madame X, Pillow Talk), born in Cleveland, Ohio (d. 1996) date of birth disputed)
Alan Hale Jr. (1921-1990)
Mar 8 American actor (Skipper-Gilligan's Island), born in Los Angeles, California
- Mar 9 Carl Betz, American actor (The Donna Reed Show; Love of Life), born in Pittsburgh, Pennsylvania (d. 1978)
- Mar 9 Dimitris Horn, Greek actor (A Girl in Black), born in Athens, Greece (d. 1998)
- Mar 10 Cecil "Cec" Linder, Polish-Canadian actor (Goldfinger, Quatermass and the Pit), born in Galicia, Poland (d. 1992)
- Mar 12 Gordon MacRae, American singer and actor (Oklahoma!; Carousel), born in East Orange, New Jersey (d. 1986)
- Mar 15 Madelyn Pugh, American television writer (I Love Lucy), born in Indianapolis, Indiana (d. 2011)
- Mar 19 Robert McFerrin, Sr., American operatic baritone (Metropolitan Opera, 1955-58; singing voice for Sidney Poitier in film "Porgy and Bess"), born in Marianna, Arkansas (d. 2006) [1]
- Mar 19 Tommy Cooper, British comedian and magician (d. 1984)
- Mar 21 Logan Ramsey, American actor (Head, Joy Sticks, Say Yes), born in Long Beach, California (d. 2000)
- Mar 22 Saturnino "Nino" Manfredi, Italian actor (Between Miracles), born in Castro dei Volsci, Italy (d. 2004)
- Mar 25 Nancy Kelly, American child actress and model (The Bad Seed, Double Exposure, Jesse James), born in Lowell, Massachusetts (d. 1995)
Simone Signoret (1921-1985)
Mar 25 German-French BAFTA, Emmy, and Academy Award- winning actress (Room at Top; Diabolique), born in Wiesbaden, Germany
- Mar 28 Dirk Bogarde [Derek van den Bogaerde] British writer and actor (Death in Venice, Servant), born in London, England (d. 1999)
About March 1921
How Old? 103 years old
Generation: Greatest Generation
Leap Year: No
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