HBO’s ‘Harry Potter’ Series Casts New Wizards: What We Know So Far

The magic is back — and this time, it’s heading to the small screen with a fresh new cast.

HBO has officially pulled back the curtain on the first round of actors set to star in its upcoming Harry Potter television series, sparking excitement and curiosity across the fandom. The long-awaited series, announced in 2023, is being designed as a more faithful adaptation of J.K. Rowling’s beloved books — with each season dedicated to a single novel. Now, with production set to begin in 2025 and a 2026 release on the horizon, the wizarding world is starting to take shape.

Meet the New Dumbledore — John Lithgow Steps Into Iconic Role

One of the biggest surprises? The casting of acclaimed actor John Lithgow as Albus Dumbledore. Best known for his work on stage and screen, including The Crown and 3rd Rock from the Sun, Lithgow brings a gravitas and warmth that producers believe is perfect for the complex headmaster of Hogwarts.

Lithgow has already started working with a dialect coach to adopt a British accent for the role. He’s said to be deeply honored by the opportunity and eager to bring new layers to Dumbledore’s personality — especially with the longer storytelling format that a TV series offers.

For fans still attached to the late Richard Harris and Sir Michael Gambon’s portrayals, Lithgow’s casting might feel like a bold shift. But producers are betting on his range and charisma to win people over.

A New Snape, Hagrid, and McGonagall Join the Cast

Another major casting revelation is Paapa Essiedu as Severus Snape. Best known for his powerful performance in I May Destroy You, Essiedu is no stranger to emotionally complex roles. His take on the famously tormented Potions Master is expected to be a standout.

Taking on the beloved role of Hagrid is Nick Frost — the British actor best known for his work in comedies like Shaun of the Dead and Hot Fuzz. Though a surprising choice at first glance, Frost’s warmth and comedic timing could bring a charming new energy to the half-giant caretaker.

And rounding out the Hogwarts faculty is Janet McTeer, an award-winning actress with a long career in film and theater, who will play Professor Minerva McGonagall. McTeer is expected to bring both authority and kindness to the role once filled by the great Maggie Smith.

Behind the Scenes: Who’s Bringing This Magical World to Life?

The series is being developed by Francesca Gardiner, who previously worked on His Dark Materials and Killing Eve. With her at the helm as showrunner and head writer, fans can expect smart, layered storytelling with attention to detail.

Mark Mylod — a director known for Succession — has signed on to direct several episodes, suggesting a cinematic approach to the series. And yes, J.K. Rowling is involved too. She remains an executive producer and is reportedly working closely with the creative team to ensure the story stays true to the books.

Where Are Harry, Ron, and Hermione?

As for the central trio — Harry, Ron, and Hermione — they haven’t been cast just yet. An open casting call held earlier this year brought in over 30,000 young hopefuls from across the UK and Ireland. HBO is taking its time, looking for unknown talent that can grow with the series, just like the original film actors did.

Producers have made it clear: this isn’t just about filling iconic roles — it’s about finding the right kids to carry the emotional weight of the story over seven seasons.

When Can Fans Expect to Watch?

Filming is set to begin in summer 2025 in Hertfordshire, England — not far from the original movie sets. The series will debut exclusively on Max (formerly HBO Max) in 2026, and if all goes to plan, it will run for at least seven seasons, with one season per book.

That longer format opens up exciting possibilities — including fan-favorite subplots that didn’t make the cut in the movies, like S.P.E.W., Peeves the poltergeist, and more in-depth looks at the Marauders’ past.

What’s Next?

With casting now underway and major roles confirmed, the buzz around the Harry Potter series is only growing. Whether you’re a longtime fan of the books or a new arrival to the magic, HBO’s fresh take on this beloved world is shaping up to be one of the most talked-about series of the decade.

Stay tuned — the Hogwarts Express is boarding once again.