List of Famous people who are 21

David Ashley Connell is an Australian cinematographer with a career of over 25 years of cinematographic work in films and television to date.

David Brenner was an American film editor known for being one of director Oliver Stone's "hot shot" group of up-and-coming film editors. He was elected as a member of the American Cinema Editors.

David P. Bartel is an American molecular biologist best known for his work on microRNAs. Bartel is a Professor of Biology at the Massachusetts Institute of Technology, Member of the Whitehead Institute, and investigator of the Howard Hughes Medical Institute (HHMI).

Johanita Scholtz is a South African badminton player. Scholtz won her first senior international title at the 2017 Botswana International tournament. She competed at the 2018 Commonwealth Games in Gold Coast. She was the women's singles gold medalist at the 2019 African Games, also won bronze medals in the team and women's doubles events.

Harrison Brian Burton is an American professional stock car racing driver. He competes full-time in the NASCAR Xfinity Series, driving the No. 20 Toyota Supra for Joe Gibbs Racing, and part-time in the ARCA Menards Series, driving the No. 20 Toyota Camry for Venturini Motorsports.

Léonice Huet is a French badminton player. Born in Dieppe, Seine-Maritime, she started her career in BadBonneval club, and in 2014 joined the CLT Orléans. She won her first senior international title at the 2016 Latvia International tournament in the mixed doubles event at the age of 16. Huet was part of the national junior team that won the mixed team title at the 2017 and 2018 European Junior Championships. She participated at the 2018 Summer Youth Olympics, helps the team Omega took the silver medal in the mixed team event.