List of Famous people who are 21

Clotilde Mollet is a French actress.

Malick Thiaw is a German-Finnish professional footballer who plays as a centre-back for the German club Schalke 04.

Liang En-shuo is a tennis player from Taiwan.

Kim So-hee is a South Korean singer. She is known for being a contestant of K-pop Star 6: The Last Chance, in which she emerged as runner-up as a member of KWINs. She officially debuted as a solo artist on May 21, 2017 and on June 1, 2017, she was then officially debuted as a member of Elris.

Simona Waltert is a Swiss tennis player.

Lea Boy is a German open water swimmer.

Lasha Bekauri is a Georgian judoka. He won the gold medal in the men's 90 kg event at the 2020 Summer Olympics in Tokyo, Japan. He also won the gold medal in his event at the 2019 Judo World Masters and the 2021 European Judo Championships.

Yvonne Brosch is a German actor and director.

Leonie Küng is a Swiss tennis player. Küng has a career-high WTA singles ranking of No. 156, achieved on 17 February 2020. She also has a career-high WTA doubles ranking of No. 331, achieved on 19 August 2019. As a qualifier, Küng reached the singles final of the Junior Wimbledon Championships in 2018.

Marla Olmstead is a painter of abstract art who by the age of four had caught international media attention for her work. Abstract artworks painted by her have been as large as five feet square and have sold for tens of thousands of US dollars. A 2005 60 Minutes II story on Olmstead that first brought her publicity led to speculation that the works supposedly created by Marla were in fact created in collaboration with her father, which was further examined in the 2007 documentary on her, My Kid Could Paint That.