List of Famous people who are 21

Gregory H. Watkins is an American sound engineer. He won an Academy Award for Best Sound and has been nominated for two more in the same category. He has worked on over 150 films since 1982.

Richard Alonzo is a make-up artist. Known for his work on critically acclaimed films, The Sixth Sense (1999), A.I. Artificial Intelligence (2001), Iron Man (2008), Avatar (2009) and Star Trek Beyond (2016) for which he received a nomination for Academy Award for Best Makeup and Hairstyling at 89th Academy Awards with Joel Harlow.

Martin Wood is a Canadian television director who has been directing since the mid-1990s. Specializing in science fiction, where he is best known for his work as a director and producer on Stargate SG-1, as well as its spin-off series Stargate Atlantis.

Christine Willes is a Canadian television, theatre and film actress who is best known for her roles as Delores Herbig on the Showtime comedy-drama Dead Like Me and Gladys the DMV demon on the CW supernatural drama television series Reaper. She is also known for her role as Granny Goodness on the CW series Smallville.

David Livingston is an American television producer and director. He is mostly known for his involvement in the writing and production of the various modern Star Trek franchises.

Lee Orloff is an American sound engineer. He won an Academy Award for Best Sound and has been nominated for six more in the same category. He has worked on over 60 films since 1984.

Tom Sanders is an English mathematician, working on problems in additive combinatorics at the interface of harmonic analysis and analytic number theory.