The HBO Harry Potter Cast Power List: Who’s In, Who Could Be Next

As Harry Potter casting rumors swirl faster than a Golden Snitch in a Quidditch final, HBO has begun assembling what might be the most anticipated TV cast in years. Thirteen years after The Deathly Hallows: Part II, the Wizarding World is officially heading back to the screen — this time as a decade-spanning series for HBO Max.

While the Fantastic Beasts films and Hogwarts Legacy video game have kept the magical flame alive, nothing has quite matched the magic of the original films. Now, with a fresh TV adaptation of J.K. Rowling’s beloved books on the way, all eyes are on the casting decisions set to define a new generation of Potterheads.

And after months of speculation, we finally have some names. Here’s your updated HBO Harry Potter Cast Power List — confirmed stars, inspired picks, and a few dream suggestions.

✅ Confirmed Cast

Dumbledore: John Lithgow

After much speculation, HBO confirmed that veteran actor John Lithgow will take on the role of the iconic Hogwarts headmaster. While the choice of an American for such a quintessentially British role raised eyebrows, Lithgow’s performance as Winston Churchill in The Crown proved his credentials. With multiple Emmy wins and Oscar nominations under his belt, Lithgow’s gravitas should bring a new dimension to Dumbledore.

McGonagall: Janet McTeer

Stepping into the formidable shoes of Maggie Smith is no easy task, but Janet McTeer seems up for the challenge. Known for standout performances in Albert Nobbs, Ozark, and The Menu, McTeer has both the presence and talent to embody Hogwarts’ stern yet kind-hearted Deputy Headmistress.

Hagrid: Nick Frost

In one of the most exciting casting choices yet, comedic actor Nick Frost has been tapped to play the beloved half-giant, Hagrid. Best known for his work in Shaun of the Dead and Hot Fuzz, Frost will bring warmth, humor, and heart to the role. Fans had previously speculated names like Brett Goldstein (Ted Lasso) for the part, but Frost feels like a perfect fit for Hogwarts’ gentle giant.

Snape: Paapa Essiedu

Paapa Essiedu, whose career has skyrocketed thanks to I May Destroy You, The Lazarus Project, and Black Mirror, will step into the shadowy role of Severus Snape. The late Alan Rickman’s portrayal remains legendary, but Essiedu’s undeniable screen presence and versatility make him an inspired, modern choice for one of the saga’s most complex characters.

Voldemort

To play He Who Must Not Be Named, you need an actor with eerie presence and unsettling intensity. The obvious top pick is Cillian Murphy, whose sharp, haunting features and chilling screen presence make him perfect for Voldemort. Though rumors once linked him to Dumbledore, Warner Bros. remains tight-lipped.

Interestingly, insider reports have also suggested Murphy is being considered for Professor Quirrell — the Defence Against the Dark Arts teacher secretly possessed by Voldemort in Philosopher’s Stone. That might complicate any plans for him to play the Dark Lord directly, unless HBO pulls off some clever double-casting.

As a younger alternative, Stranger Things’ Jamie Campbell Bower, who already terrified audiences as Vecna, would be a natural fit. He once played young Grindelwald in the Fantastic Beasts films — but in the Wizarding World, a little recasting magic never hurt.

Sirius Black

Sirius Black is wild, unpredictable, a little scruffy — but ultimately lovable. It’s a tough balance to strike, but Kit Harington feels like the perfect fit. He’s got the range, the brooding charm, and the right age to capture both Sirius’ warmth and inner torment.

Richard Madden could be another solid choice, bringing a slightly more introspective take. Long-shot picks include Benedict Cumberbatch and Tom Hiddleston, with the latter’s chaotic Loki energy making him a fun potential wildcard.

Professor Quirrell: Luke Thallon

Relative newcomer Luke Thallon, fresh off an acclaimed run as Hamlet with the Royal Shakespeare Company, has been cast as Professor Quirrell — the twitchy Defense Against the Dark Arts teacher with a dark secret. This marks Thallon’s first major screen credit, and it’ll be fascinating to see where this role takes him, especially if it leads to a later turn as Voldemort.

Bellatrix Lestrange

Helena Bonham Carter made Bellatrix unforgettable, so any recast is a challenge. But Mia Goth feels like the perfect heir. Known for her eerie, unhinged roles in films like Pearl, Goth brings a gothic intensity and unsettling edge that would suit Bellatrix brilliantly. She’s got the madness and menace to make the character her own.

The Dursleys

Rumor has it Phoebe Waller-Bridge is being eyed for Aunt Petunia, a role originally played by Fiona Shaw. At 39, she’s the right age and has a similar sharp look. Plus, her knack for dark humor makes her a great fit for Petunia’s campy, over-the-top nastiness. As for Uncle Vernon? Matt Berry would be a perfect choice, guaranteed to turn lines like “no post on Sundays!” into comedy gold.

The Road Ahead

The HBO Harry Potter series is set to begin shooting later this year, with an anticipated premiere in 2026. Like the original films, the iconic trio of Harry, Ron, and Hermione will be cast from a pool of fresh, unknown child actors. And while controversy around J.K. Rowling’s involvement has cast a shadow over the project, HBO head Casey Bloys insists it hasn’t deterred talent from signing on.

One thing is clear: this reboot isn’t just a new adaptation — it’s an opportunity for a new generation of actors to leave their mark on one of the most beloved franchises in pop culture history. And if the first casting announcements are anything to go by, the magic is far from over.

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