Sister Act is a movie.
Kathy Najimy . She is best known for voicing Peggy Hill on the animated television series King of the Hill , and her roles as Sister Mary Patrick in the comedy film Sister Act , Mary Sanderson in the comedy-horror film Hocus Pocus , and Olive Massery on the comedy series Veronica 's Closet . Sister Act . Featuring musical arrangements by Marc Shaiman , the film stars Whoopi Goldberg as a Reno lounge singer who has been put under protective custody in a San Francisco convent of Poor Clares and has to pretend to be a nun when a mob boss puts her on his hit list . One of the most financially successful comedies of the early 1990s , grossing $ 231 million worldwide , the film was rated # 83 on Bravo 's The 100 Funniest Movies list . It spawned a 1993 sequel , entitled Sister Act 2 : Back in the Habit , and a musical adaptation that premiered at the Pasadena Playhouse in Pasadena , California , in 2006 , and opened at the West End 's London Palladium with previews from May 7 , 2009 . Sister Act (musical) . It is based on the hit 1992 film comedy of the same name .