What roles did keir dullea and gary lockwood play in 2001 a space odyssey?

2001: A Space Odyssey is a 1968 science‑fiction film directed by Stanley Kubrick, whose screenplay was co‑written with Arthur C. Clarke. The film is renowned for its pioneering visual effects and its contemplative exploration of humanity’s place in the cosmos. Keir Dullea and Gary Lockwood were the principal actors credited in the film, appearing as part of the ensemble that depicts the astronauts, scientists, and the sentient computer HAL 9000 on a journey to Jupiter. The specific character names portrayed by Dullea and Lockwood are not detailed in the provided evidence, so their exact roles cannot be confirmed here. Nonetheless, their performances were central to the film’s narrative, helping to convey the story’s thematic depth. The film’s legacy continues to influence science‑fiction cinema, inspiring filmmakers and audiences with its visual mastery and philosophical questions.