Sister Act was a financially successful cover album.
Sister Act . Also in the cast are Maggie Smith , Kathy Najimy , Wendy Makkena , Mary Wickes , and Harvey Keitel . 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 .