Authors Born on August 21
- Gabrielle Burton Feminist, 1939
- Gennadiy Aygi Poet, 1934
- Gilberto Santa Rosa Bandleader, 1962
- Glenn Hughes Bassist, 1951
- Hafsat Abiola Activist, 1974
- Hayden Panettiere Actress, 1989
- Jack Buck Sports Commentator, 1924
- Jackie DeShannon Singer-Songwriter, 1941
- Jacqueline Emerson Actress, 1994
- Jake Pitts Musician, 1985
- Jesse Rutherford Singer, 1991
- Jim McMahon American Football Player, 1959
- Joe Gebbia Designer, 1981
- Joe Strummer Musician, 1952
- John Graham Mellor Musician, 1952
- John Howe Illustrator, 1957
- Jon Tester Politician, 1956
- Jonathan Schell Author, 1943
- Jules Michelet Historian, 1798
- Kacey Musgraves Singer-Songwriter, 1988
- Kelis Rogers Singer, 1979
- Ken Mehlman Politician, 1966
- Kenny Rogers Singer, 1938
- Kim Cattrall Actress, 1956
- Laura Haddock Actress, 1985
- Leonid Hurwicz Economist, 1917
- Liam Howlett Record Producer, 1971
- Loretta Devine Actress, 1949
- Marc Evan Jackson Comedian, 1970
- Margaret Chan Physician, 1947
- Mary Margaret ('Mollie') Kaye Writer, 1908
- Maxim Knight Actor, 1999
- Melvin Van Peebles Actor, 1932
- Mohammed VI of Morocco King, 1963
- Nido Qubein Businessman, 1948
- Nigel Pearson Football Manager, 1963
- Nikolay Bogolyubov Mathematician, 1909
- Patrick Demarchelier Photographer, 1943
- Perry Christie Politician, 1943
- Peter Edward Clarke Drummer, 1957