1) Harry and J.K. Rowling share the same birthday, July 31
2) The actor who played Moaning Myrtle was 37 years-old. She was the oldest actor to be a Hogwarts' student
3) Ron was supposed to swear a lot but J.K. Rowling's publisher saud that it would not be kid friendly.
4) Rubert Grint dressed up like his female drama teacher and rapped about Ron Weasly for his audition tape. His rap began, "Hello, my name is Rupert Grint, I hope you don't think I stink..."
5) Tom Felton auditioned for the parts of Harry Potter and Ron Weasly, but was chosen to play Draco Malfoy instead
6) When filming "Harry Potter and the Prisoner of Askaban" Tom Felton's Hogwarts robe's were sewn shut so he couldn't sneak food in.
7) Fred and George Weasleys' birthday is on April Fools Day
8) Harry, Ron and Hermione all got their own chocolate frogs cards. Ron and Dumbledore both say that it is their biggest accomplishment
9) There are 700 fouls in quidditch
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Random Question: What Hogwarts' house are you in?
My Answer: Ravenclaw