Famous 21 Years Old

Millie Bobby Brown, the English actress and model, rose to prominence after acting in the TV series Stranger Things and then in the film, Godzilla: King of the Monsters, in 2019. She was named one of the 100 most influential people in the world by Time magazine in April 2018, making her the youngest person ever to be so.

Aidan Gallagher is a popular upcoming actor who started acting when he was just ten years old, appearing in an episode of the TV show Modern Family. He is also a singer. Besides his work in the entertainment industry, he is an environmentalist who follows a vegan lifestyle. He was named UN Environment Goodwill Ambassador for North America in 2018.

Grace VanderWaal is a singer-songwriter who began her career as a YouTuber, uploading videos of her original songs and covers. She also started performing in local shows, gaining attention for her distinctive vocals. She won the TV competition show, America's Got Talent (AGT), in 2016 and received the 2017 Billboard Women in Music Rising Star Award.

Courtney Hadwin is an English singer-songwriter who achieved popularity by participating in the first series of ITV's The Voice Kids and the 13th season of NBC's America's Got Talent, where she was a finalist. She is one of the youngest artists to sign a record deal with Arista Records and Syco Entertainment.

Mackenzie Ziegler initially gained fame with the reality show Dance Moms, where she appeared with her older sister, Maddie Ziegler. Mackenzie then plunged into music and toured with singers such as Johnny Orlando. She also competed on Dancing with the Stars: Juniors. She is extemely popular on social-media platforms, too.

Coco Gauff is an American tennis player who became the youngest singles WTA Tour title-holder since 2004 when she won her first WTA title at the 2019 Upper Austria Ladies Linz at the age of 15. Coco Gauff, who has achieved a career-high ranking of 23 in singles, is the youngest player ranked by the WTA in the top 100.

British YouTube star Nikki Lilly is best known for her beauty, fashion, and lifestyle content. An ailment that she was born with, known as arteriovenous malformation, has left her physically deformed but hasn’t been able to deter her. She is also associated with charitable activities and is an author, presenter, and singer.

Canadian-American actor-singer and Nashville star Maisy Stella is a teen icon who has gained phenomenal success with her role of Daphne Conrad. She has also been part of the musical duo Lennon & Maisy, along with her sister Lennon Stella. The duo is popular on YouTube, too.

Leanne Wong is an American artistic gymnast best known for winning a silver medal and a bronze medal at the Artistic Gymnastics World Championships in 2021. In 2019, she was part of the team that won the gold medal in the women's artistic team event at the Pan American Games.   

Kayla DiCello is an American artistic gymnast who won the bronze medal in the all-around event at the Artistic Gymnastics World Championships in 2021. DiCello had a prolific junior career; she won two bronze medals and a gold medal at the Junior World Championships in 2019.

Anastasia Bezrukova is a Russian model and actress who began her career as a child. At the tender age of ten, she became one of the most sought-after child models in Europe. Besides modeling for brands like Benetton, Pinko, Moschino, and Incanto, she has also been featured on the cover of Vogue Bambini. She started acting in 2016.