Premise: Moonstruck is a 1987 American romantic comedy film directed by Norman Jewison and written by John Patrick Shanley. It is about a widowed 37-year-old Italian-American woman (Cher) who falls in love with her fiancé's (Danny Aiello) estranged, hot-tempered younger brother (Nicolas Cage). Vincent Gardenia and Olympia Dukakis play supporting roles.
Hypothesis: John Patrick Shanley wrote a movie that Cher stars in.