Willow is a 1988 American sword and sorcery adventure film directed by Ron Howard and produced by Nigel Wooll. The film was executive produced by George Lucas and written by Bob Dolman from a story by Lucas. The film stars Val Kilmer, Joanne Whalley, Warwick Davis, and Jean Marsh. Davis portrays the title character, an aspiring magician who teams up with a disaffected warrior (Kilmer) to protect a young baby princess from an evil queen (Marsh).

Lucas conceived the idea for the film in 1972, approaching Howard to direct during the post-production phase of Cocoon in 1985. Bob Dolman was brought in to write the screenplay, coming up with seven drafts that Lucas was actively involved in the developmental process of each draft. It was finished in late 1986. It was then set up at Metro-Goldwyn-Mayer (MGM) and principal photography began in April 1987, finishing the following October. The majority of filming took place in Dinorwic quarry in Wales with some at Elstree Studios in Hertfordshire, as well as a small section in New Zealand. Industrial Light & Magic created the visual effects sequences, which led to a revolutionary breakthrough with digital morphing technology.

The film was released in 1988 to mixed reviews from critics with praise for the visual effects and character designs but criticisms for its direction and plot. It grossed $137.6 million worldwide against a $35 million budget. While not the blockbuster some expected, it turned a profit based on international box office returns and strong home video and television returns. It received two Academy Award nominations. A television series that served as a sequel to the film was released on Disney+ in 2022.