The Quest is a ballet score by William Walton, written for a ballet of the same title, now lost, choreographed by Frederick Ashton in 1943. Two versions of the score exist: one for the small orchestra for which Walton wrote (because of wartime constraints), and a posthumously constructed version rescored for an orchestra of the larger size usually favoured by the composer. The ballet, with a scenario by Doris Langley Moore, was based on The Faerie Queene by Edmund Spenser. It was first given by the Sadler's Wells Ballet company.