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 characterisation. It's hardly pulling up any trees, and it holds few surprises, yet it's so warm and gentle with its humour it's near impossible to dislike.

The laughs obviously come from Goldberg's street wise gal trying to adapt to life in a convent. The big message that unfolds, as she gets more at ease with her surroundings, is that not only can earthy girls come to be honourable by learning new fortitudes, but also that they can positively affect those around them in a perceived stuffy environment.

The trajectory of the nunnery choir under Goldberg's tutorship - from wailing cats to cherubic angels - is the film's highlights, while Maggie Smith as the prim and proper Mother Superior is class unbound. Harvey Keitel as the gangster who is after our sister's blood is wasted, and the ending is never really in doubt, yet this is a good pick me up movie, undemanding fun for those after a quick smiley fix. 7/10