List of Famous people who are 21

Amalie Magelund Krogh is a Danish badminton player, specializing in doubles play. As a junior player, she was the silver medalists at the 2018 European Junior Championships in the team and girls' doubles events.

Arnaud-Sylvain-André Merklé is a French badminton player from Staffelfelden. He was the boy's singles European Junior Champion in 2018, and also part of the national junior team clinched the mixed team title in 2017 and 2018. He participated at the 2018 Summer Youth Olympics in Buenos Aires, Argentina, and reached into the boys' singles bronze medal match losing to Kodai Naraoka of Japan in the rubber games.

Tucker Albrizzi is an American actor. He is best known for his roles as Tyler Duncan on Big Time Rush, Jake on Good Luck Charlie, Randall Snyder on American Vandal and Colin McConnell on A.P. Bio. He has appeared in such movies as I Am Number Four, Bridesmaids, Sicko, and Alvin and the Chipmunks: Chipwrecked.

Asty Dwi Widyaningrum is an Indonesian female badminton player.