Keir Dullea (born May 30, 1936) is an actor best remembered for his role as astronaut David Bowman in the 1968 film 2001: A Space Odyssey and in 1984's 2010: The Year We Make Contact.
Born in Cleveland, Ohio, he was raised in the Greenwich Village section of New York City where his parents ran a bookstore. He made his film debut in 1961's The Hoodlum Priest, in which he played a juvenile delinquent, though he had an earlier role as the German pilot in a 1960 television adaptation of Mrs. Miniver. He played a number of emotionally disturbed youths in films such as David and Lisa (1962) and Bunny Lake is Missing (1965). After "2001," he portrayed the Marquis de Sade with John Huston in the movie "De Sade" (1969). Despite, or perhaps due to, the great success of 2001, he has had difficulty reproducing a similar success on film, though he has had a long and successful career on stage in New York City and in regional theaters.
Dullea's other notable roles include Devon in the short-lived 1973 science fiction series The Starlost, Clayton Anderson Jr. in Madam X, and Paul Renfield in The Fox.