Giselle, or The Wilis (French: Giselle, ou Les Wilis) is a romantic ballet in two acts. It was first performed by the Ballet du Théâtre de l'Académie Royale de Musique at the Salle Le Peletier in Paris, France, on Sunday 28 June 1841. The premiere starred Italian ballerina Carlotta Grisi as Giselle. The ballet was an unqualified triumph. Giselle became hugely popular, and was staged at once across Europe, Russia, and the United States.