Dune is a 1984 American epic space opera film written and directed by David Lynch, and based on the 1965 novel of the same name by Frank Herbert. It was filmed at the Churubusco Studios in Mexico City. The soundtrack was composed by the rock band Toto, with a contribution from Brian Eno. Its large ensemble cast includes Kyle MacLachlan (in his film debut), Patrick Stewart, Brad Dourif, Dean Stockwell, Virginia Madsen, José Ferrer, Sean Young, Silvana Mangano, Sting, Linda Hunt, and Max von Sydow.

The setting is the distant future, chronicling the conflict between rival noble families as they battle for control of the extremely harsh desert planet Arrakis, also known as Dune. The planet is the only source of the drug melange (spice), which allows prescience and is vital to space travel, making it the most essential and valuable commodity in the universe. Paul Atreides is the scion and heir of a powerful noble family, whose appointment to the control of Arrakis brings them into conflict with its former overlords, House Harkonnen. Paul is also possibly the Kwisatz Haderach, a messianic figure expected by the Bene Gesserit sisterhood.

After the novel's initial success, attempts to adapt Dune as a film began in 1971. A lengthy process of development followed throughout the 1970s, during which Arthur P. Jacobs, Alejandro Jodorowsky, and Ridley Scott unsuccessfully tried to bring their visions to the screen. In 1981, executive producer Dino De Laurentiis hired Lynch as director.

The film underperformed at the box office, grossing $30.9 million against a $40–42 million budget. At least four versions have been released worldwide. Lynch largely disowned the finished film and had his name removed or changed to pseudonyms in the credits on certain versions. The film has developed a cult following, but opinion varies between fans of the novel and fans of Lynch's films.