List of Famous people who are 21

Jenson Tyler "J. T." Brooksby is an American professional tennis player. He reached a career-high ranking of World No. 99 in singles on 9 August 2021.

Mike Singer is a German pop singer and songwriter.

Vanessa Guillén was a 20-year-old U.S. Army soldier who was murdered on April 22, 2020 inside a Fort Hood, Texas armory by another enlisted soldier, Aaron David Robinson, age 20. Guillén had been missing since April 22 when some of her dismembered remains were found buried along the Leon River on June 30.

Bible John is an unidentified serial killer who is believed to have murdered three young women between 1968 and 1969 in Glasgow, Scotland.

Lachlan Watson is an American actor. At the time of their 2018 debut in the Netflix original series Chilling Adventures of Sabrina, Watson was one of the youngest non-binary actors in Hollywood.

Erik Botheim is a Norwegian professional footballer who plays as a forward for Bodø/Glimt.

Yara Sayeh Shahidi is an American actress, model, and activist. She gained recognition for her starring role as the oldest daughter Zoey Johnson on the sitcom Black-ish (2014–present) and its spin-off series Grown-ish (2018–present). Her film credits include Imagine That (2009), Smallfoot (2018), and the lead role in The Sun Is Also a Star (2019). Time included her on "The 30 Most Influential Teens of 2016" list.

Gable Dan Steveson is an American freestyle and folkstyle wrestler who competes at heavyweight. In freestyle, he is qualified to represent the United States at the 2020 Summer Olympics after winning the 2020 U.S. Olympic Team Trials and is the reigning Pan American Continental champion. Earlier, he was the Bill Farrell Memorial International champion and a Final X contestant in 2019, and is a three-time consecutive age-group World Champion, once as a junior and twice as a cadet.

Khabane "Khaby" Lame is a Senegalese-Italian TikTok video host. His videos became known for being short comedy skits where he sarcastically points people who complicate simple tasks for no reason at all. As of June 2021, Lame's TikTok account is the third most-followed TikTok account.

William Anthony Patrick Smallbone is a professional footballer who plays as a central midfielder for Premier League club Southampton. Born in England, Smallbone represents the Republic of Ireland internationally.