Authors Born on August 21
- Ahmed Kathrada Politician, 1929
- Aja Monet Poet, 1987
- Aleksandr Mikhailovich Orlov Scout, 1895
- Alexander Chee Writer, 1967
- Alicia Witt Actress, 1975
- Angelina Maccarone Film Director, 1965
- Annet Mahendru Actress, 1989
- Anthony Boucher Critic, 1911
- Archie Griffin American Football Player, 1954
- Arnold Goodman Advocate, 1913
- Art Farmer Musician, 1928
- Asher Brown Durand Painter, 1796
- Aubrey Beardsley Illustrator, 1872
- August Bournonville Choreographer, 1805
- Augustin-Louis Cauchy Mathematician, 1789
- Barun Sobti Actor, 1984
- Ben Shneiderman Computer Scientist, 1947
- Bo Burnham Actor, 1990
- Brad Thor Novelist, 1969
- Brandon Bays Author, 1953
- Brody Jenner Television Personality, 1983
- Cameron Winklevoss Entrepreneur, 1981
- Carly Steel Television Presenter, 1987
- Carmel Snow Editor, 1887
- Carrie-Anne Moss Actress, 1967
- Celia Brayfield Author, 1945
- Chantelle Houghton Television Personality, 1983
- Chris Brasher Athlete, 1928
- Clarence Douglas Dillon Diplomat, 1909
- Claude Grahame-White Aviator, 1879
- Count Basie Pianist, 1904
- Darynda Jones Author, 1965
- David A. Clarke, Jr. Public Servant, 1956
- Denise Mina Writer, 1966
- Dirk Bruinenberg Musician, 1968
- Endre Szemeredi Mathematician, 1940
- Eric Daman Costume Designer, 1970
- Erin Kelly Actress, 1981
- Eytan Fox Film Director, 1964
- Francois Pinault Businessman, 1936