quick question

Imagine you’re reading a novel and you run across a reference to an old movie called The Trouble with Angels.

Hayley Mills as Mary Clancy, June Harding as Rachel Devery, Rosalind Russell as Mother Superior, 1966. Hayley Mills is the trouble maker (“I’ve got a scathingly brilliant idea”).

Does this mean anything to you, or would you be totally in the dark? I may not be a practicing Catholic, but I still love this movie and I’m wondering if anybody else remembers it, at all.