1. Michelle Fairley in the "Deathly Hallows" as Hermione's mother.



Game of Thrones fans might know her Catelyn Stark.





2. Natalia Tena as Nymphadora Tonks



She plays Osha in Game of Thrones





3. David Bradley played Argus Filch



He plays Walder Frey in Game of Thrones.



(source techinsider)

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4. Ciarán Hinds played Aberforth Dumbledore



Fans might recognize him as Mance Rayder





5. Freddie Stroma played Cormac McLaggen



He played Dickon Tarly in Season 6 of Game of Thrones.





6. Julian Glover did the voice of Aragog, the giant spider.



He plays Grand Maester Pycelle in GOT.



(source techinsider)

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7. 7-foot-1 Ian Whyte has played Madame Olympe



He's played many characters on "GOT," including a White Walker, the Mountain in season two, and Wun Wun.





8. Nicholas Blane played in "Harry Potter and the Order of the Phoenix" as Bob, a wizard who worked with Arthur Weasley at the Ministry of Magic. Bob is the one holding the box.



In "GOT," he played one of The Thirteen who rule Qarth.





9. Bronson Webb played a Slytherin student



Webb played WIll, a member of the Night's Watch in season one.



(source techinsider)

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10. Ralph Ineson plays Amycus Carrow. He's to the right of Snape.



In "GOT," he played Dagmer Cleftjaw, a raider for House Greyjoy.





11. Edward Tudor-Pole played Mr. Borgin in a deleted scene from "The Chamber of Secrets."



He played a protester in a season two episode of Game of Thrones.



12. Sally Mortemore played Madame Irma Pince, the librarian.



She played as a Braavosi woman in the sixth season.





13. Daniel Tuite as the "skinny ministry wizard" (He's somewhere in there.)



He played Lothar Frey in season 6.



(source techinsider)

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