Janet McTeer, Paapa Essiedu and Nick Frost cast in the new ‘Harry Potter’ series. Photo:

Rodin Eckenroth/Getty; Dave Benett/Getty; Alan Chapman/Dave Benett/WireImage

• HBO confirmed who will play several iconic roles in its Harry Potter TV reboot in a news release on Monday, April 14
• The cast is set to include Luke Thallon as Professor Quirinus Quirrell and Paul Whitehouse as Argus Filch
• “We’re delighted to have such extraordinary talent onboard, and we can’t wait to see them bring these beloved characters to new life,” said the series’ executive producers

The Wizarding World is filling out its cast!

HBO announced on Monday that it has finalized two key roles in the upcoming Harry Potter TV series — Professor Quirinus Quirrell and Hogwarts caretaker Argus Filch. 

British stage actor Luke Thallon will take on the role of the nervous Defense Against the Dark Arts professor, who has more to him than meets the eye. Actor Ian Hart previously portrayed Quirrell in the first Potter film. Thallon, 29, is a theater standout, who most recently played Hamlet for the Royal Shakespeare Company.

Luke Thallon and Paul Whitehouse cast as Professor Quirrell and Argus Filch in the ‘Harry Potter’ series. Eamonn M. McCormack/Getty

Thallon is relatively unknown in the film and TV world, recently telling Deadline, “I would love to do something on screen. I really would. There’s no pretending that I turn lots of things down, but I’m just waiting for the reason to go to screen to be as exciting and as fulfilling as the things I get to do on stage now.“

Five-time BAFTA winner Paul Whitehouse has landed the role of the villainous Filch, which was originated by David Bradley in the eight Potter films. 

Whitehouse, 66, is a Welsh actor and comedian, known for his work in British comedies like The Fast Show and Harry & Paul. He also worked with director Tim Burton on The Corpse Bride and Alice in Wonderland and had a role in 2017’s The Death of Stalin. 

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Thallon and Whitehouse join the growing cast of the HBO series, which is being executive produced by Potter author J.K. Rowling. Thus far American actor John Lithgow has been cast as Hogwarts headmaster Albus Dumbledore. In the films, Dumbledore was played by both Richard Harris and later Michael Gambon after Harris’ death in 2002.  

John Lithgow and Michael Gambon as Albus Dumbledore. Frazer Harrison/WireImage; Warner Bros.

British actress Janet McTeer is set to take on the role of Professor Minerva McGonagall, which was originated by Dame Maggie Smith. McTeer, 63, is a two-time Oscar nominee, who has had notable roles in Ozark, Me Before You, The Woman in Black, Into the Storm and who played the goddess Hera opposite Jeff Goldblum’s Zeus in the short-lived mythology series Kaos. 

Janet McTeer and Maggie Smith as Professor McGonagall. by Rodin Eckenroth/Getty; Jaap Buitendijk/Warner Bros

The role of Professor Severus Snape, originated by the late Alan Rickman, has been appointed to Paapa Essiedu, who is known for his roles in I May Destroy You, Black Mirror and the holiday comedy Genie opposite Melissa McCarthy. 

Paapa Essiedu and Alan Rickman as Professor Snape. Dave Benett/Getty; Warner Bros./courtesy Everett Collection

British comedian Nick Frost, who is best known for his Three Flavours Cornetto Trilogy films like Shaun of the Dead with longtime friend and collaborator Simon Pegg, is taking on the beloved part of gamekeeper Rubeus Hagrid. Hagrid was originated by the late Robbie Coltrane. 

“We’re delighted to have such extraordinary talent onboard, and we can’t wait to see them bring these beloved characters to new life,” said Francesca Gardiner, showrunner and executive producer and Mark Mylod, director of multiple episodes and executive producer in a news release.

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Nick Frost and Robbie Coltrane as Hagrid.  Alan Chapman/Dave Benett/WireImage; Warner Bros

The series has yet to cast the core roles of the magical pals Harry Potter, Hermione Granger and Ron Weasley, which were originated by Daniel Radcliffe, Emma Watson and Rupert Grint in the hit films. No premiere date has been set for the series, which HBO calls a “faithful adaptation” of the seven Potter books.