Authors Born on December 18
- A.M. Homes Writer, 1961
- Abe Burrows Comedian, 1910
- Alan Rudolph Film Director, 1943
- Alejandro Sanz Musician, 1968
- Alex Bennett Broadcaster, 1939
- Alfred Bester Novelist, 1913
- Alfred Billings Street Writer, 1811
- Alfred Robens Politician, 1910
- Alvin E. Roth Academic, 1951
- Amnat Ruenroeng Boxer, 1979
- Andrew Murphy Athlete, 1969
- Arantxa Sanchez Vicario Tennis Player, 1971
- Ashley Benson Actress, 1989
- Axwell Disc Jockey, 1977
- Ayaka Singer-Songwriter, 1987
- Baron Vaughn Actor, 1980
- Benjamin W. Chidlaw Engineering, 1900
- Benjamin Watson Football Player, 1980
- Bentinho Football Player, 1971
- Betty Grable Actress, 1916
- Billie Eilish Singer, 2001
- Bobby Keys Saxophonist, 1943
- Brad Cohen Motivational Speaker, 1973
- Brad Pitt Actor, 1963
- Bridgit Mendler Singer, 1992
- Brigham Young Jr. President, 1836
- Casper Van Dien Actor, 1968
- Celia Johnson Actress, 1908
- Charles Galton Darwin Physicist, 1887
- Charles Oakley Basketball Player, 1963
- Charles Wesley Writer, 1707
- Christina Aguilera Singer, 1980
- Christopher Fry Poet, 1907
- Daniel Mazia Biologist, 1912
- Daniel S. Loeb Investor, 1961
- David Chipperfield Architect, 1953
- DMX Rapper, 1970
- Edwin Armstrong Inventor, 1890
- Edwin Howard Armstrong Inventor, 1890
- Elliot Easton Musician, 1953