Amadis or Amadis de Gaule is a tragédie en musique in a prologue and five acts by Jean-Baptiste Lully to a libretto by Philippe Quinault based on Nicolas Herberay des Essarts' adaptation of Garci Rodríguez de Montalvo's Amadis de Gaula. It was premiered by the Paris Opera at the Théâtre du Palais-Royal sometime from January 15 to 18, 1684. There was a later production at Versailles without scenery or machines in 1685.

Jean-Baptiste Lully was a French composer, dancer and instrumentalist of Italian birth, who is considered a master of the French Baroque music style. Best known for his operas, he spent most of his life working in the court of Louis XIV of France and became a French subject in 1661. He was a close friend of the playwright Molière, with whom he collaborated on numerous comédie-ballets, including L'Amour médecin, George Dandin ou le Mari confondu, Monsieur de Pourceaugnac, Psyché and his best known work, Le Bourgeois gentilhomme.