THX 1138 is a 1971 American social science fiction film co-written and directed by George Lucas in his directorial debut. Produced by Francis Ford Coppola and co-written by Walter Murch, the film stars Robert Duvall and Donald Pleasence, with Don Pedro Colley, Maggie McOmie, and Ian Wolfe in supporting roles. The film is set in a dystopian future in which the citizens are controlled by android police and mandatory use of drugs that suppress emotions.

George Walton Lucas Jr. is an American filmmaker and philanthropist. He created the Star Wars and Indiana Jones franchises and founded Lucasfilm, LucasArts, Industrial Light & Magic and THX. He served as chairman of Lucasfilm, before selling it to The Walt Disney Company in 2012. He is one of history's most financially successful filmmakers and has been nominated for four Academy Awards. He personally directed or conceived ten of the 100 highest-grossing movies at the North American box office, adjusted for ticket-price inflation. He is considered to be one of the most significant figures of the 20th-century New Hollywood movement, and a pioneer of the modern blockbuster. Despite this, he has remained an independent filmmaker away from Hollywood for most of his career.