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Character mistake: At the reception in the end of the movie, Grandma Bunny goes up to Joanna and then Joanna says she'd like to introduce Grandma Bunny to Will's grandma- even though Grandma Bunny is Will's grandmother. I doubt the maternal and paternal grandparents didn't already know each other and if they didn't, why was it Joanna who introduced them?
Continuity: In the post-rehearsal dinner scene where Marni and Joanna start fighting and throwing dishes, Joanna dumps a bowl of green soup over Marni's head. As Will is chastising both of them, the green slime on Marni's clothes and hair changes in each shot when the camera cuts back to Marni. It's most noticeable on her bangs, which are sometimes plastered flat against her forehead and other times are separated into spiky pieces.






