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. He was recently cast as a guest actor in the Paramount+ TV series Halo which premiered on March 24, 2022 (2022-03-24).