Le Villi is an opera–ballet in two acts composed by Giacomo Puccini to an Italian libretto by Ferdinando Fontana, based on the short story "Les Willis" by Jean-Baptiste Alphonse Karr. Karr's story was in turn based in the Central European legend of the Vila, also used in the ballet Giselle. The opera, in its original one-act version, premiered at Milan's Teatro Dal Verme, on 31 May 1884.