Guess Who's Coming to Dinner

Joanna (Katharine Houghton), the beautiful daughter of crusading publisher Matthew Drayton (Tracy) and his patrician wife Christina (Hepburn), returns home with her new fiance John Prentice (Sidney Poitier), a distinguished black doctor. Christina accepts her daughter's decision to marry John, but Matthew is shocked by this interracial union; the doctor's parents are equally dismayed. Both families must sit down face to face and examine each other's level of intolerance. (official distributor synopsis)