List of Famous people who are 21

Line Drost Christophersen is a Danish badminton player. She once trained at the Skælskør club. Christophersen clinched the girls' singles title at the 2018 European Junior Championships, and the silver medal at the World Junior Championships. She along Denmark team won the 2020 European Women's Team Championships.

Freja Ravn Nielsen is a Danish badminton player from KMB2010 club in Kastrup, specializing in doubles play. She started playing badminton at the age of 6 in Dragør badminton club, and entered the national team since 2016. As a junior player, she was the silver medalists at the 2018 European Junior Championships in the team and girls' doubles events.

Andy Classen is a German musician, sound engineer and record producer.

Satoru Okada is the former general manager of Nintendo Research & Engineering, the division designing and developing Nintendo handheld game consoles. He is best known for creating the original Game Boy. He was also assistant producer and director of and contributor to several Nintendo games, notably Metroid, released for the Nintendo Entertainment System in 1986.

Ian Martin is an English human rights activist/advisor and sometime United Nations official. His most recent UN assignment was as the Special Representative of the Secretary-General and Head of the United Nations Support Mission in Libya. From 2015 to 2018 he was Executive Director of Security Council Report.

Ed Cooper Clarke is a writer and actor from London, England.