Acis et Galatée (Acis and Galatea) is an opera by Jean-Baptiste Lully. Unlike most of his operas, which are designated tragédies en musique, Lully called this work a pastorale-héroïque, because it was on a pastoral theme and had only three acts (plus a prologue) compared to the usual five. Otherwise, there is little musically or dramatically to distinguish it from Lully's tragédies.