'Harry Potter' series cast sealed: Who are the new Harry, Ron, Hermione & where do you know them from- details

A New Generation of Magic Begins

HBO’s reboot of Harry Potter is shaping up to be a defining TV event. With its blend of rising stars and acclaimed veterans, the series aims to reintroduce the magical world to a new audience — and perhaps redefine what a Harry Potter adaptation can look like in the streaming age.

Over 30,000 Auditions, Three Final Picks

The casting process for the reboot began in late 2024 when HBO announced open auditions for children between the ages of 9 and 11. It was a massive global call, with casting directors Lucy Bevan and Emily Brockmann leading the selection process.

After months of narrowing down options, the final trio was chosen — three young actors who will now lead one of the most ambitious TV adaptations in recent memory.

Meet Dominic McLaughlin: The New Harry Potter

Dominic McLaughlin, a young Scottish actor, has been cast as Harry Potter in HBO’s upcoming TV adaptation of J.K. Rowling’s beloved book series. This is McLaughlin’s first major role, and while he might not be a familiar name yet, he recently appeared in the upcoming Sky comedy Grow, starring Nick Frost — who, incidentally, will also play Hagrid in the new Harry Potter series.

McLaughlin was selected through an open casting call held by HBO in 2024, which saw over 30,000 children auditioning. Just like Daniel Radcliffe back in 2000, Dominic is stepping into the spotlight at a young age and with minimal screen experience — a move that echoes the franchise's tradition of discovering fresh faces.

Arabella Stanton: From ‘Matilda’ to Hermione Granger

Arabella Stanton will play Hermione Granger, a role made iconic by Emma Watson. Of the three lead actors, Stanton brings the most stage experience to the table. She played the lead in Matilda: The Musical on the West End from 2023 to 2024, earning praise for her performance.

Her casting has already drawn positive reactions online, with fans pointing out that she carries the confidence and poise that the character demands. Arabella made her debut just last year, but her theatre background gives her a strong foundation as she transitions to television.

Alastair Stout: A Newcomer as Ron Weasley

Ron Weasley will be portrayed by Alastair Stout, another newcomer to the screen. With no previous acting credits to his name, this HBO series will mark his official entry into the world of professional acting.

Interestingly, many fans have noted a striking resemblance between Stout and Rupert Grint, who played Ron in the original films. The casting choice has been received warmly, especially by long-time Potterheads who feel Stout captures the same “everyman charm” that Grint brought to the role.

The Reboot Isn’t a Sequel — It’s a Fresh Start

This new Harry Potter series is not a continuation of the original films but a complete re-adaptation of the seven books. HBO has confirmed that the show will go deeper into the source material, with each season likely covering one book.

Francesca Gardiner will serve as the showrunner and lead writer. She’s joined by director Mark Mylod, known for his work on Succession. Both have stated that this new version will focus heavily on character depth and narrative detail.

Who Else Is in the Cast?

The trio will be supported by an ensemble of veteran actors. John Lithgow takes on the role of Albus Dumbledore, while Paapa Essiedu has been cast as Severus Snape. Minerva McGonagall will be portrayed by Janet McTeer.

Nick Frost will play Hagrid, Luke Thallon joins as Professor Quirrell, and Paul Whitehouse appears as caretaker Argus Filch. The cast is a blend of experience and fresh energy — a balance that HBO hopes will ground the show while introducing a new generation to the wizarding world.

What’s Next for the Production?

Filming is set to begin in the summer of 2025. The show is being developed by HBO in association with Warner Bros. Television and Brontë Film and TV. Rowling is listed as an executive producer, alongside David Heyman, Neil Blair, and Ruth Kenley-Letts.

While there’s no exact release date, HBO has indicated a likely premiere window between 2026 and 2027. The official cast photo of McLaughlin, Stanton, and Stout — standing together in an open field — has already been released, stirring both nostalgia and curiosity.