List of Famous people who are 21

Aidan Devine is an English Canadian film actor. He was born in the United Kingdom and immigrated with his family to Canada at the age of 15. He studied at Dawson College's Dome Theatre in Montreal, Quebec and began his acting career in Montreal. He would later relocate to Toronto, Ontario. His 1993 breakout role came in Denys Arcand's, Love and Human Remains. Since then he has worked steadily in Canadian and American television and cinema capturing two Gemini Awards; a best actor award in 1997 for his performance as Ted Lindsay in Net Worth and in 1998, a best supporting actor Gemini for his performance as airframe engineer, Jim Chamberlin in The Arrow. He has been nominated three other times.

Andy Linden is an English actor. He is best known for his roles as Mundungus Fletcher in Harry Potter and the Deathly Hallows – Part 1 and John the Watch in Count Arthur Strong.

Darwin Shaw is a British, stage, film, television actor, and director. Formerly practicing as a medical doctor, he retrained as an actor at LAMDA in 2004 after studying theatre in New York City.

Paul Dillon is an American character actor who began his career in show business in Chicago. His film career began in 1994 with the film Blink in which he played the role of Neal Booker. He played Paddy O'Brien in Austin Powers: International Man of Mystery, the most successful film in which he has a credited role.

Allen Coulter is an American television and film director, credited with a number of successful television programs. He has directed two feature films, Hollywoodland, a film regarding the questionable death of George Reeves starring Adrien Brody, Diane Lane, and Ben Affleck, and the 2010 film Remember Me.

Sarah Monette is an American novelist and short story author, writing mostly in the genres of fantasy and horror. Under the name Katherine Addison, she published the fantasy novel The Goblin Emperor, which received the Locus Award for Best Fantasy Novel and was nominated for the Nebula, Hugo and World Fantasy Awards.

Mendel Rosenblum is a professor of Computer Science at Stanford University and co-founder of VMware.