We've reached an exciting milestone with HBO's Harry Potter TV series, as the first six cast members have been revealed. While fans eagerly await announcements for key characters like Harry, Ron, Hermione, and Lord Voldemort, we now have insight into who will portray iconic figures such as Albus Dumbledore, Minerva McGonagall, and Severus Snape. Dive in to discover the confirmed cast and who remains to be announced.

Confirmed Cast:

John Lithgow as Albus Dumbledore

The role of Albus Dumbledore, the revered headmaster of Hogwarts and one of the most powerful wizards, will be played by the six-time Emmy and two-time Tony Award-winning actor, John Lithgow. Dumbledore's mentorship of Harry Potter and his complex history with Gellert Grindelwald add depth to his character. Lithgow's extensive career includes roles in "3rd Rock From the Sun," "Dexter," "The Crown," and films like "Shrek" and "Interstellar."

Who played Albus Dumbledore in the Harry Potter films? Richard Harris portrayed Dumbledore in "Sorcerer's Stone" and "Chamber of Secrets," while Michael Gambon took over for the remainder of the series. Younger versions were played by Toby Regbo and Jude Law.

Janet McTeer as Minerva McGonagall

Tony and Golden Globe Award winner Janet McTeer will bring to life Professor Minerva McGonagall, the head of Gryffindor and deputy headmistress of Hogwarts. McGonagall's early involvement, such as delivering Harry to the Dursleys, makes her a pivotal figure from the start. McTeer's previous work includes "Me Before You," "The Menu," and "Ozark."

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

Emmy-nominated Paapa Essiedu will step into the complex role of Severus Snape, the Potions professor and head of Slytherin with a deep connection to Harry and his parents. Essiedu's notable performances include "I May Destroy You," "Black Mirror," and "Men."

Who played Severus Snape in the Harry Potter films? Alan Rickman, with Alec Hopkins and Benedict Clarke portraying younger versions.

Nick Frost as Rubeus Hagrid

Nick Frost will embody Rubeus Hagrid, the beloved half-giant and Hogwarts gamekeeper who introduces Harry to the magical world. Frost is well-known for his roles in "Shaun of the Dead," "Hot Fuzz," and "The World's End."

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

Luke Thallon as Quirinus Quirrell

Newcomer Luke Thallon will play Quirinus Quirrell, the Defense Against the Dark Arts professor during Harry's first year. Thallon's previous work includes "The Favourite" and "Present Laughter."

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

Paul Whitehouse as Argus Filch

BAFTA winner Paul Whitehouse will portray Argus Filch, the Hogwarts caretaker often seen with his cat, Mrs. Norris. Whitehouse is recognized for "The Fast Show," "Harry & Paul," and "The Death of Stalin."

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, check out our ranking of the 25 best Harry Potter characters from the movies and books, the producing duo that will be leading the charge on HBO's reboot, and our guide to reading your way through the Harry Potter books.