The Wiz is a 1978 American musical adventure fantasy film directed by Sidney Lumet. Adapted from the 1974 Broadway musical of the same name, the film reimagines the classic 1900 children's novel The Wonderful Wizard of Oz by L. Frank Baum with an African-American cast. Dorothy, a twenty-four year old New York City schoolteacher from Harlem finds herself magically transported to the urban fantasy Land of Oz. On her travels seeking help from the mysterious Wiz, Dorothy befriends a Scarecrow, a Tin Man, and a Cowardly Lion.

Produced by Universal Pictures and Motown Productions, filming took place in Queens, New York City from October to December 1977, with a cast starring Diana Ross, Michael Jackson (in his feature film debut), Nipsey Russell, Ted Ross, Mabel King, Theresa Merritt, Thelma Carpenter, Lena Horne, and Richard Pryor. The story was reworked from William F. Brown's Broadway libretto by Joel Schumacher, and Quincy Jones supervised the adaptation of songs by Charlie Smalls and Luther Vandross. A handful of new songs, written by Jones and the songwriting team of Nickolas Ashford & Valerie Simpson, were added for the project.

The Wiz was theatrically released the following year on October 24, 1978 to critical and commercial failure. The film received generally negative reviews from critics, with many unfavorably comparing the film to its source material. Some critics criticized the casting of Ross as Dorothy. Despite its initial failure, the film became a cult classic among audiences, Ross's fanbase, Jackson's fanbase, and Oz enthusiasts. The 2015 live television adaptation The Wiz Live! was influenced by the film.