List of Famous people who are 21

Yutaro Watanbe is a professional Japanese baseball player. He is a pitcher for the Saitama Seibu Lions of Nippon Professional Baseball (NPB).

Peter Morgan is an American film producer. He was appointed the vice president of development of RKO Pictures in 2002 and the senior vice president of production for Sony Pictures' O.N.C. Entertainment in 2005.

Maria Antonella Barucci is an Italian astronomer at the Observatory-Meudon, Paris. She is credited by the Minor Planet Center with a total of 3 minor planet discoveries she made in 1984 and 1985. Most notably is her joint discovery with R. Scott Dunbar of the near-Earth and Aten asteroid 3362 Khufu at Palomar Observatory, as well as her co-discovery of the Apollo asteroid 3752 Camillo.

Molly Nyman has composed numerous film scores, mostly in collaboration with Harry Escott. She is the elder daughter of composer Michael Nyman, and appeared in Peter Greenaway's The Falls, as did her mother, Aet Nyman. Nyman was awarded the Women's International Film & Television Showcase 2014 Sound Award in recognition of her work as a composer.

Karim Amer is an Egyptian-American film producer and director. He worked on The Square (2013) and The Great Hack (2019); the former was the first Egyptian film to earn an Academy Award nomination and went on to win three Emmy Awards, while the latter got nominated for an Emmy and a BAFTA Award. In 2020, he produced and directed The Vow, an HBO documentary series about the self-improvement group, NXIVM.

Micki Meuser, also known as Mickey Meuser, is a German bass player, studio musician and music producer for bands such as Die Ärzte, Ideal, Ina Deter, Lemonbabies, among others.