The filmmakers made over 200,000 coins for the bank vault scene in Gringotts. If they lived in the Wizarding World, they'd be mega-rich. (Source)

Kate Winslet was almost Helena Ravenclaw, but her agent nixed it. (We've already seen her pale and ghostly in Titanic, we guess?) (Source)

Believe it or not, Part 2 was the shortest film in the franchise…and you'll probably be surprised to see which one was longest. (Source)