14 actors who went from 'Harry Potter' to 'Game of Thrones'

nymphadora tonka and oshaWarner Bros. and HBO

For "Harry Potter" and "Game of Thrones" fans, the worlds keep colliding.

Though the series themselves are pretty disparate, they converge thanks to the actors who have brought the characters to the screen. Wednesday, it was announced that actor Jim Broadbent will be the latest "Harry Potter" alum to head to HBO's hit show.

Here are 14 actors who have appeared in both series.

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Jim Broadbent played the well-intentioned, if somewhat daft, Professor Slughorn who comes out of retirement to teach potions at Hogwarts.

Jim Broadbent played the well-intentioned, if somewhat daft, Professor Slughorn who comes out of retirement to teach potions at Hogwarts.

He was just cast as a "significant" unknown character for the upcoming season seven of "Game of Thrones."

He was just cast as a "significant" unknown character for the upcoming season seven of "Game of Thrones."

You can read about who he might be here.

Michelle Fairley made a brief appearance in the first part of "Deathly Hallows" as Hermione's mother.

Michelle Fairley made a brief appearance in the first part of "Deathly Hallows" as Hermione's mother.

But "Game of Thrones" fans probably know her best as the strong-willed Catelyn Stark.

But "Game of Thrones" fans probably know her best as the strong-willed Catelyn Stark.

Natalia Tena is known throughout the "Harry Potter" fandom as the amazing Nymphadora Tonks (but don't call her Nymphadora).

Natalia Tena is known throughout the "Harry Potter" fandom as the amazing Nymphadora Tonks (but don't call her Nymphadora).

She joined "Game of Thrones" as the fearless wildling Osha in the first season until she and Rickon disappeared for a bit during season four and five.

She joined "Game of Thrones" as the fearless wildling Osha in the first season until she and Rickon disappeared for a bit during season four and five.

She briefly returned in season six, but she was killed by Ramsay Bolton when she tried to stab him. RIP, Osha.

David Bradley played Argus Filch, the often cruel caretaker at Hogwarts.

David Bradley played Argus Filch, the often cruel caretaker at Hogwarts.

He played Walder Frey, the awful head of House Frey who betrayed the Stark family.

He played Walder Frey, the awful head of House Frey who betrayed the Stark family.

Ciarán Hinds played Aberforth Dumbledore, Albus' brother, in the final "Harry Potter" movie.

Ciarán Hinds played Aberforth Dumbledore, Albus' brother, in the final "Harry Potter" movie.

Fans might recognize him as Mance Rayder, the King Beyond the Wall, in "Game of Thrones."

Fans might recognize him as Mance Rayder, the King Beyond the Wall, in "Game of Thrones."

Freddie Stroma played the slightly obnoxious Cormac McLaggen, who annoyed Hermione during Professor Slughorn's Christmas party.

Freddie Stroma played the slightly obnoxious Cormac McLaggen, who annoyed Hermione during Professor Slughorn's Christmas party.

He showed up during the sixth season of "Game of Thrones" as Dickon Tarly, Sam's younger brother.

He showed up during the sixth season of "Game of Thrones" as Dickon Tarly, Sam's younger brother.

You won't recognize Julian Glover in "Harry Potter," because he was the voice of Aragog, the giant spider.

You won't recognize Julian Glover in "Harry Potter," because he was the voice of Aragog, the giant spider.

But any "Game of Thrones" fan would recognize him as Grand Maester Pycelle.

But any "Game of Thrones" fan would recognize him as Grand Maester Pycelle.

Standing at 7-foot-1, Ian Whyte has played his fair share of giant characters, including the whole body shots for Madame Olympe Maxime (also portrayed by Frances de la Tour).

Standing at 7-foot-1, Ian Whyte has played his fair share of giant characters, including the whole body shots for Madame Olympe Maxime (also portrayed by Frances de la Tour).

He's portrayed multiple characters on "Game of Thrones," including a White Walker, the Mountain in season two, and Wun Wun the giant.

He's portrayed multiple characters on "Game of Thrones," including a White Walker, the Mountain in season two, and Wun Wun the giant.

Nicholas Blane made an appearance 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.

Nicholas Blane made an appearance 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 "Game of Thrones," he played the Spice King, one of The Thirteen who rule Qarth. He was killed by fellow member and warlock Pyat Pree.

In "Game of Thrones," he played the Spice King, one of The Thirteen who rule Qarth. He was killed by fellow member and warlock Pyat Pree.

Bronson Webb played a Slytherin student and friend to Draco Malfoy in "Harry Potter and the Prisoner of Azkaban." He's the one on the right.

Bronson Webb played a Slytherin student and friend to Draco Malfoy in "Harry Potter and the Prisoner of Azkaban." He's the one on the right.

Webb played WIll, a member of the Night's Watch who fled from the White Walkers only to be executed by Ned Stark for deserting his men.

Webb played WIll, a member of the Night's Watch who fled from the White Walkers only to be executed by Ned Stark for deserting his men.

Ralph Ineson plays Amycus Carrow, a Death Eater in three "Harry Potter" films. He's to the right of Snape.

Ralph Ineson plays Amycus Carrow, a Death Eater in three "Harry Potter" films. He's to the right of Snape.

He played Dagmer Cleftjaw, a raider for House Greyjoy. But after betraying Theon at Winterfell and stabbing Maester Luwin, Dagmer was in for a rude awakening when he and his men were flayed alive by the sadistic Ramsay Snow.

He played Dagmer Cleftjaw, a raider for House Greyjoy. But after betraying Theon at Winterfell and stabbing Maester Luwin, Dagmer was in for a rude awakening when he and his men were flayed alive by the sadistic Ramsay Snow.

Edward Tudor-Pole played Mr. Borgin, an owner of Borgin and Burke's, in a deleted scene from "The Chamber of Secrets."

Edward Tudor-Pole played Mr. Borgin, an owner of Borgin and Burke's, in a deleted scene from "The Chamber of Secrets."

He popped up as a protester in a season two episode.

He popped up as a protester in a season two episode.

Sally Mortemore played Madame Irma Pince, the librarian at Hogwarts, in "Harry Potter and the Chamber of Secrets."

Sally Mortemore played Madame Irma Pince, the librarian at Hogwarts, in "Harry Potter and the Chamber of Secrets."

She popped into "Game of Thrones" as a Braavosi woman in the sixth season.

She popped into "Game of Thrones" as a Braavosi woman in the sixth season.

Blink and you'll miss Daniel Tuite as the "skinny ministry wizard" in "Deathly Hallows Part 1." (He's somewhere in there.)

Blink and you'll miss Daniel Tuite as the "skinny ministry wizard" in "Deathly Hallows Part 1." (He's somewhere in there.)

But he has a more prominent role in "Game of Thrones" as Lothar Frey in season six.

But he has a more prominent role in "Game of Thrones" as Lothar Frey in season six.
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