Exciting news for Harry Potter fans! The HBO Harry Potter TV series has just announced its first six cast members, marking a significant milestone in the production of this highly anticipated reboot. While we eagerly await announcements for pivotal roles like Harry Potter, Ron Weasley, Hermione Granger, and the infamous Lord Voldemort, we're thrilled to introduce the actors stepping into the iconic roles of Albus Dumbledore, Minerva McGonagall, Severus Snape, and other beloved characters.

Read on to discover who has been officially confirmed for this new adaptation of the Harry Potter saga, and which key characters are still awaiting their casting reveal.

Confirmed Cast:

John Lithgow as Albus Dumbledore

John Lithgow Image Credit: Warner Bros. Discovery/Jessica Howes John Lithgow, a distinguished actor with six Emmys and two Tony Awards under his belt, has been cast as Albus Dumbledore, the revered headmaster of Hogwarts. Known for his wisdom and power, Dumbledore plays a crucial role in guiding Harry Potter through his magical journey. His complex past, including his tumultuous relationship with the dark wizard Gellert Grindelwald, adds depth to his character.

Lithgow's notable roles include 3rd Rock From the Sun, Dexter, The Crown, Shrek, The World According to Garp, Perry Mason, The Old Man, Footloose, Terms of Endearment, and Interstellar, among many others.

Who played Albus Dumbledore in the Harry Potter films? Richard Harris in Sorcerer’s Stone and Chamber of Secrets, followed by Michael Gambon in the subsequent films. Younger versions were portrayed by Toby Regbo and Jude Law.

Janet McTeer as Minerva McGonagall

Janet McTeer Image Credit: Warner Bros. Discovery/Andrew Crowley Janet McTeer, celebrated for her Tony and Golden Globe Awards, will portray Professor Minerva McGonagall. As the head of Gryffindor and deputy headmistress, McGonagall is a formidable figure at Hogwarts, known for her strict yet fair nature. She's introduced early in the series, assisting Dumbledore in delivering baby Harry to the Dursleys.

McTeer's previous work includes Me Before You, The Menu, Albert Nobbs, Tumbleweeds, The Old Man, Ozark, and Sorry for Your Loss.

Who played Minerva McGonagall in the Harry Potter films? Dame Maggie Smith in the original series, and Fiona Glascott in the Fantastic Beasts films.

Paapa Essiedu as Severus Snape

Paapa Essiedu Image Credit: Warner Bros. Discovery/Ruth Crafer Emmy-nominated actor Paapa Essiedu will embody Severus Snape, the enigmatic Potions professor and head of Slytherin. Snape's intricate backstory and his relationship with Harry and his parents, James and Lily Potter, make him one of the series' most compelling characters.

Essiedu's notable appearances include I May Destroy You, The Outrun, Black Mirror, Men, The Lazarus Project, and Gangs of London.

Who played Severus Snape in the Harry Potter films? Alan Rickman, with Alec Hopkins and Benedict Clarke playing the teenage and child versions, respectively.

Nick Frost as Rubeus Hagrid

Nick Frost Image Credit: Warner Bros. Discovery/Lee Malone Nick Frost will bring to life Rubeus Hagrid, the beloved half-giant who serves as Hogwarts' gamekeeper and groundskeeper. Hagrid's kindness and loyalty make him a cherished friend to Harry, starting from his rescue of Harry from the Dursleys.

Frost is known for his roles in comedic films like Shaun of the Dead, Skeleton Crew, The World’s End, Hot Fuzz, and Attack the Block.

Who played Rubeus Hagrid in the Harry Potter films? Robbie Coltrane, with Martin Bayfield portraying the young Hagrid.

Luke Thallon as Quirinus Quirrell

Luke Thallon Image Credit: Warner Bros. Discovery/Phil Sharp Luke Thallon steps into the role of Quirinus Quirrell, the Defense Against the Dark Arts professor during Harry's first year at Hogwarts. A relative newcomer, Thallon has appeared in The Favourite and Present Laughter.

Who played Quirinus Quirrell in the Harry Potter films? Ian Hart

Paul Whitehouse as Argus Filch

Paul Whitehouse Image Credit: Warner Bros. Discovery/Mike Marsland BAFTA-winning actor Paul Whitehouse will play Argus Filch, the Hogwarts caretaker often accompanied by his cat, Mrs. Norris. Known for his strict enforcement of school rules, Filch adds a unique flavor to the Hogwarts experience.

Whitehouse's notable works include The Fast Show, Harry & Paul, The Death of Stalin, Alice Through the Looking Glass, Corpse Bride, and Alice in Wonderland.

Who played Argus Filch in the Harry Potter films? David Bradley

Major Characters Yet to Be Cast:

Harry Potter Ron Weasley Hermione Granger Lord Voldemort Draco Malfoy Sirius Black Remus Lupin Dolores Umbridge Alastor Moody Ginny Weasley Luna Lovegood Fred Weasley George Weasley Arthur Weasley Molly Weasley James Potter Lily Potter Bellatrix Lestrange Neville Longbottom Cedric Diggory Dudley Dursley Petunia Dursley Vernon Dursley Lucius Malfoy Cho Chang Seamus Finnigan Dean Thomas Gilderoy Lockhart Dobby Nearly Headless Nick Moaning Myrtle Sybill Trelawney Filius Flitwick And many more...

For more insights, explore our ranking of the 25 best Harry Potter characters from the movies and books, learn about the producing duo leading the charge on HBO’s reboot, and find our guide to reading your way through the Harry Potter books.