Demon Seed is a 1977 American science fiction–horror film directed by Donald Cammell. It stars Julie Christie and Fritz Weaver. The film was based on the 1973 novel of the same name by Dean Koontz, and concerns the imprisonment and forced impregnation of a woman by an artificially intelligent computer. Gerrit Graham, Berry Kroeger, Lisa Lu and Larry J. Blake also appear in the film, with Robert Vaughn uncredited as the voice of the computer.

Donald Seton Cammell was a Scottish painter, screenwriter, and film director. He has a cult reputation largely due to his debut film Performance, which he wrote the screenplay for and co-directed with Nicolas Roeg. He died by suicide after the last film he directed, Wild Side, was taken away from him and recut by the production company.