We're Off to See the Wizard comes from the 1939 MGM film The Wizard of Oz, where Dorothy, the Scarecrow, the Tin Man and the Cowardly Lion sing it on their way to meet the Wizard in the Emerald City. Composed by Harold Arlen with lyrics by E. Y. Harburg, it became one of the film's most recognisable musical moments. Decades of television broadcasts, stage adaptations and cultural references have kept the tune familiar to new audiences, so creators still reach for it whenever a scene needs instant nostalgia and a sense of cheerful adventure.