List of Famous people who are 21

Vincent Thill is a Luxembourgish professional footballer who plays as a midfielder for Nacional and the Luxembourg national team. He is the younger brother of fellow Luxembourg internationals Sébastien Thill and Olivier Thill.

Lizzie Webb, often known as "Mad Lizzie", is an English fitness expert, author and presenter. In the 1980s and 1990s she presented daily exercise routines on British morning television channel TV-am. She was introduced onto the channel's flagship show Good Morning Britain in response to the popularity of exercise teacher Diana Moran on the rival BBC One show Breakfast Time. She created many videos, such as Pop Dance with Lizzie, Shake-out with Lizzie and many more. She has produced 9 videos and 8 books. Her first video was The Body Programme with Lizzie Webb and her last was Pop Dance with Lizzie!!!

Eden Alene is an Israeli singer. Having won the seventh season of the singing competition HaKokhav HaBa, she was set to represent Israel in the Eurovision Song Contest 2020, with her song "Feker Libi", planned to be held in Rotterdam, Netherlands. After the cancellation of the 2020 contest due to the COVID-19 pandemic, she was internally chosen to represent Israel in the Eurovision Song Contest 2021, this time with "Set Me Free".

Thomas William Darnton Dean is a British competitive freestyle swimmer. He is a double Olympic gold medalist, winning gold individually in 200 metre freestyle and as part of a team in 4 × 200 m freestyle relay at the 2020 Summer Olympics.

Jeremie Agyekum Frimpong is a Dutch professional footballer who plays as a right-back for Bundesliga club Bayer Leverkusen.

Andrei Igorevich Svechnikov is a Russian professional ice hockey winger currently playing for the Carolina Hurricanes of the National Hockey League (NHL). The Hurricanes selected him second overall in the 2018 NHL Entry Draft.

Mia Kusakabe is a Japanese talent, actress, singer and model. She was a member of the girl group Prizmmy before their disbandment in 2017.

Marvin Olawale Akinlabi Park, simply known as Marvin, is a Spanish professional footballer who plays as an attacking midfielder for Real Madrid Castilla.

Jann-Fiete Arp is a German footballer who plays as a forward for Bayern Munich II. He has also represented Germany at youth international level.

Sōta Yamamoto is a Japanese figure skater. He is the 2018 CS Asian Open Trophy champion, the 2016 Youth Olympic champion, the 2015 World Junior bronze medalist, a two-time Junior Grand Prix Final medalist, and the 2015–16 Japan junior national champion.