Authors Born on October 21
- Aaron Tveit Film Actor, 1983
- Alan Barth Journalist, 1906
- Alan Schaaf Businessman, 1987
- Alexander Lernet-Holenia Writer, 1897
- Alfred Nobel Scientist, 1833
- Alphonse de Lamartine Poet, 1790
- Amber Rose Actress, 1983
- Amy Ephron Novelist, 1952
- Andre Geim Physician, 1958
- Andrew Scott Actor, 1976
- Anne M. Mulcahy Businesswoman, 1952
- Arun Sarin Businessman, 1954
- Attila the Stockbroker Poet, 1957
- Basilea Schlink Leader, 1904
- Benjamin Netanyahu Politician, 1949
- Bob Mayer Author, 1959
- Brigitte Gabriel Author, 1964
- Brock Yates Journalist, 1933
- Bruce Lipton Biologist, 1944
- Carl Baugh Scientist, 1936
- Carleton Young Actor, 1905
- Carrie Fisher Actress, 1956
- Catherine Hardwicke Film Director, 1955
- Celia Cruz Singer, 1925
- Charles R. Knight Artist, 1874
- Charlotte Sullivan Actress, 1983
- Chieko N. Okazaki Teacher, 1926
- Christopher A. Sims Econometrician, 1942
- Dale Jamieson Professor, 1947
- Dan Kimball Author, 1960
- Dan Winters Photographer, 1962
- Darius Khondji Cinematographer, 1955
- David Campese Rugby Union Player, 1962
- Dean Lewis Singer-Songwriter, 1987
- Denene Millner Author, 1968
- Dizzy Gillespie Trumpeter, 1917
- Doja Cat Singer, 1995
- Edmondo De Amicis Writer, 1846
- Edward Charles Ford Baseball Player, 1928
- Elizabeth Warnock Fernea Writer, 1927