Character mistake: Throughout the film, Lucy's aunt is called "Patsy." In the final scene Lucy refers to her as "Patty."
The Awful Truth (1937)
1 character mistake - chronological order
Directed by: Leo McCarey
Starring: Cary Grant, Ralph Bellamy, Irene Dunne, Alexander D'Arcy
Revealing mistake: When the piano lid smashes Cary Grant's fingers, the lid obviously stops inches above his hand, even though a drink is positioned on the piano in an attempt to hide the gap.
'Dan' Leeson: Well, I guess a man's best friend is his mother.