When lively lounge singer Deloris sees her mobster beau commit murder, she is relocated for her protection. Set up in the guise of a nun in a California convent, she proceeds to upend the quiet lives of the resident sisters.

Whoopi Goldberg
as Deloris Van Cartier / Sister Mary Clarence

Maggie Smith
as Mother Superior

Kathy Najimy
as Sister Mary Patrick

Wendy Makkena
as Sister Mary Robert

Mary Wickes
as Sister Mary Lazarus

Harvey Keitel
as Vince LaRocca

Bill Nunn
as Lt. Eddie Souther

Robert Miranda
as Joey

Richard Portnow
as Willy

Ellen Albertini Dow
as Choir Nun
John Chard
Mary Clarence? Like Clarence Williams III from The Mod Squad? When a worldly singer witnesses a mob crime, the police hide her as a nun in a traditional convent where she has trouble fitting in. Whoopi Goldberg is the sister act of the title, and boy does she have a great time with the charact...
Filipe Manuel Neto
**One of the great comedies of the decade.** We are facing a film that was a huge success when it was released and continues, even today, to have a vast legion of fans. It's one of those light, friendly comedies that doesn't age, is always current, and is a pleasure to revisit from time to time. ...
CinemaSerf
Whoopi Goldberg and Dame Maggie Smith are on top form in this engaging comedy thriller. Goldberg "Deloris van Cartier" witnesses her gangster boyfriend commit murder. When she is drafted in by the police to testify against him, she is put into a witness protection scheme with a difference. She is to...