List of Famous people named Keir

Keir David Peters Gilchrist is an English-born Canadian actor and musician. Gilchrist is known for playing Marshall Gregson on Showtime's original series United States of Tara, Craig Gilner in the 2010 comedy-drama film It's Kind of a Funny Story, Paul in It Follows, and Sam Gardner in the Netflix original series Atypical. He is also the vocalist of grindcore band Whelm and death metal band Phalanx.

Keir Atwood Dullea is an American actor who portrayed astronaut David Bowman in the 1968 film 2001: A Space Odyssey and its 1984 sequel, 2010: The Year We Make Contact. His other film roles include David and Lisa (1962), Bunny Lake Is Missing (1965) and Black Christmas (1974). He studied acting at the Neighborhood Playhouse School of the Theatre in New York City. Dullea has also had a long and successful career on stage in New York City and in regional theaters; he has stated that, despite being more recognized for his film work, he prefers the stage.

Keir O'Donnell is an Australian–American actor, best known for his roles in the films Wedding Crashers, The Break-Up, Paul Blart: Mall Cop and American Sniper as well as numerous television appearances.