THX 1138 is a 1971 science fiction film directed by George Lucas in his feature directorial debut. The film was written by Lucas and Walter Murch. It stars Robert Duvall and Donald Pleasence and depicts a dystopian future in which the populace is controlled through android police officers and mandatory use of drugs that suppress emotion, including sexual desire.
THX 1138 was developed from Lucas' student film Electronic Labyrinth: THX 1138 4EB, which he made in 1967 while attending the University of Southern California's film school. The feature film was produced in a joint venture between Warner Brothers and Francis Ford Coppola's production company, American Zoetrope. A novelization by Ben Bova was published in 1971.