Celebrities who are 21 years old

Millie Bobby Brown (born 19 February 2004) is an English actress. She rose to prominence for her role as Eleven in the Netflix science fiction horror series Stranger Things (2016–present), for which she received Primetime Emmy Award nominations for Outstanding Supporting Actress in a Drama Series. At age 13, she became one of the youngest nominees in Emmy history. Her film debut came in 2019 with the monster film Godzilla: King of the Monsters.

Tate Rosner McRae (born July 1, 2003) is a Canadian singer and dancer. At the age of thirteen, she gained prominence as the first Canadian finalist on the American reality TV show So You Think You Can Dance. McRae caught the attention of RCA Records in 2019 after her original song "One Day" (2017) went viral on YouTube, subsequently releasing her debut EP, All the Things I Never Said (2020). McRae soon gained wider recognition after her song "You Broke Me First" became an international hit. In 2021, McRae was the youngest musician featured on Forbes' 30 Under 30 list. Her second EP, Too Young to Be Sad (2021) was the most streamed female EP of 2021 on Spotify. Her debut studio album, I Used to Think I Could Fly, was released on May 27, 2022. The album was met with positive reviews from critics and reached the top 10 in various countries, while entering at number thirteen on the US Billboard 200.

Charlton Kenneth Jeffrey Howard (born 17 August 2003), known professionally as the Kid Laroi (stylised as the Kid LAROI), is an Australian singer, rapper and songwriter.

Peyton Elizabeth Lee (born May 22, 2004) is an American actress. She is known for starring in the title role of the Disney Channel comedy-drama series Andi Mack (2017–2019). She has continued to work with Disney in the film Secret Society of Second-Born Royals (2020) and the series Doogie Kameāloha, M.D. (2021–).

Mackenzie Frances Ziegler (born June 4, 2004; age 20) is an American singer, actress, former dancer, and internet personality. She appeared as a child for six years on the Lifetime reality dance series Dance Moms together with her older sister, dancer and actress Maddie Ziegler.

Charli Grace D'Amelio (born May 1, 2004) is an American social media personality and dancer. She started actively posting content on the social video sharing app, TikTok in early 2019, where she quickly amassed a large following and subsequently became the most-followed account on the app less than a year later, after passing Loren Gray. Her TikTok account as of August 2020 has over 77 million followers.

Ángela Aguilar Álvarez Alcalá (born October 8, 2003) is a Mexican and American singer. She was born in Los Angeles while her mother was accompanying her father, Pepe Aguilar, on tour. Aguilar gained notable recognition after performing "La Llorona" at the 19th Annual Latin Grammy Awards in 2019. Her paternal grandparents are the actors and singers from the Golden Age of Mexican cinema, Antonio Aguilar and Flor Silvestre.

Teagan Croft (born 23 April 2004) is an Australian actress. She appeared as Rachel Azarath / Rachel Roth / White Raven on the DC Universe / HBO Max superhero series Titans (2018–2023) and portrayed the title character in the 2016 science fiction film The Osiris Child.

Grace Avery VanderWaal (born January 15, 2004) is an American singer, songwriter and actress. She is known for her distinctive vocals and has often accompanied herself on the ukulele.