Paris Hilton has joined Alexa Vega and Paul Sorvino in the cast of Repo! The Genetic Opera!, a full-blown musical thriller co-financed by Saw makers Twisted Pictures and Lionsgate, according to Variety.

Darren Lynn Bousman, director of three Saw films, including the fourth entry, which opens Oct. 26, has spent several years working on the movie version of an opera hatched with screenwriter-composers Darren Smith and Terrance Zdunich.

Hilton will sing in a futuristic thriller framed around musical numbers that range from opera to rock. The setting is 2056, when a plague nearly destroys the human race and survival is dependent upon being able to finance a pricey organ transplant.

Hilton plays a daughter of the organ transplant magnate (Sorvino) who is the villain of the piece.

Repo! the Genetic Opera! was released November 7th, 2008 and stars Alexa Vega, Paul Sorvino, Anthony Head, Sarah Brightman, Paris Hilton, Bill Moseley, Nivek Ogre, Terrance Zdunich. The film is directed by Darren Lynn Bousman.