Wicked is a 2003 musical with music and lyrics by Stephen Schwartz and book by Winnie Holzman. It is based on the 1995 Gregory Maguire novel Wicked: The Life and Times of the Wicked Witch of the West, in turn based on L. Frank Baum's 1900 novel The Wonderful Wizard of Oz and its 1939 Metro-Goldwyn-Mayer film adaptation.

The show is told from the perspective of, and focuses on, the witches of the Land of Oz; its plot begins before and continues after Dorothy Gale arrives in Oz from Kansas. Wicked tells the story of two unlikely friends, Elphaba (the Wicked Witch of the West) and Galinda (later Glinda the Good Witch), whose relationship struggles through their opposing personalities and viewpoints, same love-interest, reactions to the Wizard's corrupt government, and, ultimately, Elphaba's private fall from grace.