Hogwarts Is Open For Business Again

HBO’s Harry Potter Series Shatters Records, Unveils Its Cast, and Sets a New Standard for Wizarding World Storytelling

It was, perhaps, the most anticipated trailer in a generation. When HBO released the first teaser for its forthcoming Harry Potter series on March 26, 2026, the internet didn’t just react — it erupted. Within 48 hours, the two-minute glimpse into a reimagined Wizarding World had accumulated over 277 million organic views across platforms, smashing through HBO and Max records to become the most-watched trailer in the network’s history, exceeding the previous record by more than double. For context, that’s more than twice what The Last of Us Season 2 managed. Hogwarts, it appears, is very much back in session.

The teaser — debuted in London ahead of the launch of HBO Max in the UK and Ireland — opens with a shot many will recognise as an old dream: the Dursley home on Privet Drive, all ghastly wallpaper and unloving silence. A young boy lives in a cupboard under the stairs. And then, slowly, magically, everything changes.

“I’ve always wanted to know about my parents.” — Harry Potter (Dominic McLaughlin) to Hagrid, in the teaser trailer

Key Numbers at a Glance:

• 277 Million views in 48 hours
• 2× the previous HBO trailer record
• 8 episodes planned for Season One
• ~$100 million estimated cost per episode
• 32,000+ children auditioned for the trio
• 7 seasons planned across the full saga

THE NEW GOLDEN TRIO: Thirty Thousand Children. Three Stars.

The search for HBO’s Harry, Hermione, and Ron was nothing short of historic. An open casting call issued in September 2024 drew over 32,000 young actors, with executive producer and director Mark Mylod and his team reviewing up to a thousand audition tapes per day. Ten months later, in May 2025, three names emerged from that enormous field.

They are largely unknown faces — and that, it seems, is entirely by design. Where the original films made household names of Daniel Radcliffe, Emma Watson, and Rupert Grint, HBO has opted for a new generation of children unburdened by prior celebrity. Their freshness, the producers argued, is precisely the point.

Dominic McLaughlin as Harry Potter

(Replacing: Daniel Radcliffe, films 2001–2011)

Originally from Lanarkshire, Scotland, McLaughlin beat more than 32,000 hopefuls to claim the most coveted role in television. He previously appeared in the CBBC series Gifted and the Sky film Grow — where, remarkably, he already starred alongside his soon-to-be on-screen Hagrid, Nick Frost. The trailer shows a vulnerable, wide-eyed boy discovering his place in a world far larger than a cupboard under the stairs.

Arabella Stanton as Hermione Granger

(Replacing: Emma Watson, films 2001–2011)

English actress Arabella Stanton is no stranger to iconic material — she previously played the title role in Matilda: The Musical on the West End, and voiced Control in Andrew Lloyd Webber’s Starlight Express. The HBO series marks her screen debut, and she has also been cast as the voice of a younger Hermione in upcoming audiobook adaptations of the first three novels.

Alastair Stout as Ron Weasley

(Replacing: Rupert Grint, films 2001–2011)

Perhaps the purest “discovered from nothing” story of the three, Stout had exactly one acting credit to his name before landing the role of Ron Weasley: an appearance as the “son at dinner” in an Albert Barlett potato advert. He has the requisite red hair and, from what the trailer reveals, an endearing warmth that recalls Rupert Grint’s original portrayal without imitating it.

Lox Pratt as Draco Malfoy

(Replacing: Tom Felton, films 2001–2011)

The trailer gives us a brief but telling glimpse of the new Draco — contemplative, coiled, already dangerous in the way only well-dressed aristocratic children can be. Draco’s arc across all seven books is one of the richest in the saga, and the series format gives HBO room to explore it in unprecedented depth.

THE LEGENDARY SUPPORTING CAST: The Professors Take Their Seats

If HBO went for fresh faces with the trio, they compensated with staggering prestige in the adult ensemble. The faculty of the new Hogwarts reads less like a TV cast list and more like a roll call of the finest theatrical and screen talent working today.

John Lithgow as Albus Dumbledore

(Replacing: Richard Harris (2001–02) & Michael Gambon (2004–2011))

A six-time Emmy winner, two-time Tony Award winner, Olivier Award winner, and Oscar nominee, Lithgow brings perhaps the most decorated résumé of any actor in the series to the role of Hogwarts’ all-knowing Headmaster. Known for The Crown, 3rd Rock from the Sun, and Dexter, he entered negotiations in February 2025 and was confirmed in April. He has spoken of feeling “stung” by criticism related to J.K. Rowling’s political views, while standing by the material itself as “clearly on the side of the angels.”

Paapa Essiedu as Severus Snape

(Replacing: Alan Rickman, films 2001–2011, d. 2016)

The most talked-about casting in the series — and the most controversial. Emmy, Olivier, and BAFTA nominee Essiedu is best known for I May Destroy You and The Outrun. His casting drew immediate criticism from some corners of the internet, as Snape is described as white in Rowling’s books. In March 2026, Essiedu revealed he had received death threats and racist abuse as a result. The trailer’s glimpses of him suggest a Snape every bit as menacing and conflicted as Alan Rickman’s iconic interpretation — drawn in a different shade, but unmistakably Snape.

Janet McTeer as Professor Minerva McGonagall

(Replacing: Dame Maggie Smith, films 2001–2011, d. 2024)

Tony Award, Golden Globe, and Olivier winner — and Oscar and Emmy nominee — McTeer is one of the most formidably accomplished actresses of her generation. Taking over from the late Dame Maggie Smith, she faces perhaps the single most beloved role in the entire supporting cast. From the trailer, she appears to carry the part with an expected mix of severity and warmth, welcoming first-year students with an imperious authority that feels immediately right.

Nick Frost as Rubeus Hagrid

(Replacing: Robbie Coltrane, films 2001–2011, d. 2022)

Best known as Simon Pegg’s perpetual comedy foil in Shaun of the Dead and Hot Fuzz, Nick Frost steps into the enormous boots of Rubeus Hagrid — a role that demands equal measures of lumbering physicality and tender emotional depth. His appearance in the trailer, telling Harry that his parents were “the kindest, bravest people I have ever met,” is already drawing emotional responses online. The fact that Frost and McLaughlin previously worked together on Grow makes their on-screen bond feel immediately lived-in.

EXTENDED CAST AT A GLANCE

⭐ Warwick Davis is the sole cast member to reprise his exact role from the original film franchise — a lovely bridge between the two adaptations.

WHAT THE TRAILER REVEALS

What viewers have noted most is the visual fidelity — a Hogwarts that feels architecturally grander than the films. The series is set firmly in the 1990s, with careful period detail: Muggle outfits reflecting the decade’s particular fashion crimes, Mrs Weasley dressed as an archetypal 90s mum, and Aunt Petunia’s enormous glasses. Hans Zimmer — who composed scores for The Dark Knight, Interstellar, and Dune — is providing the music.

Scenes visible in the teaser:

• The Dursley home on Privet Drive — precisely as readers imagined it
• Harry living in the cupboard under the stairs in ill-fitting hand-me-down clothes
• Harry being chased by Dudley and his gang — a moment never depicted in the films
• Petunia cutting Harry’s hair, which grows back overnight
• Harry and Hagrid on the London Underground — an intimate, emotional moment
• Hogwarts’ grand entrance hall, staircases, and Professor Sprout’s greenhouse
• The Sorting Hat ceremony, Quidditch scenes, and classroom sequences
• New designs for Bertie Bott’s Every-Flavour Beans and Wizarding confections

BEHIND THE CAMERA

The series is written and run by Francesca Gardiner, whose previous credits include Killing Eve and HBO’s Succession. Director Mark Mylod is best known for helming Succession’s most critically lauded episodes and episodes of The Last of Us. Cinematographer Adriano Goldman — who shot The Crown — is responsible for the visual texture.

Principal photography began at Warner Bros. Studios Leavesden in Hertfordshire on July 14, 2025 — the same studio complex where all eight original films were shot. A temporary school for up to 600 child actors has been built on the grounds. The working production title is Dark Train.

J.K. Rowling is serving as executive producer. Her involvement has been a subject of controversy, given her widely publicised views on trans rights, which cast members, including Lithgow and Essiedu, have had to navigate publicly.

“The biggest streaming event in the history of HBO Max and arguably in streaming, period.” — JB Perrette, CEO of Global Streaming & Games, Warner Bros. Discovery

HOW DO THE NEW PERFORMANCES COMPARE?

It is far too early for a full critical comparison — but the trailer offers some preliminary observations. Where Chris Columbus’s 2001 film tilted firmly toward warmth and fairy-tale wonder, the HBO teaser suggests something slightly more grounded in emotional reality. Harry’s vulnerability with the Dursleys is rendered with less comic distance and more genuine pathos.

Paapa Essiedu’s Snape is immediately arrested — eyes perpetually narrowed, moving through Hogwarts’ corridors like a shadow given academic robes. His casting is divisive precisely because it invites comparison with Alan Rickman’s irreplaceable performance, but Essiedu’s formidable theatrical reputation suggests he may carve something genuinely distinctive.

John Lithgow’s Dumbledore projects an authority different in register from both Richard Harris’s gentle grandfatherly warmth and Michael Gambon’s more mercurial interpretation. Lithgow’s Dumbledore looks, if anything, more politically complex — fitting for a series with the time and space to do full justice to the character’s complicated history.

LOOKING AHEAD: A Decade in the Making

Actors signed to the project are committed for up to ten years — a remarkable pledge signalling HBO’s intent to see the entire saga through. Each of the seven books will receive its own season, with Series One comprising eight episodes, each bookended by the beginning and end of a Hogwarts school year.

Harry Potter and the Philosopher’s Stone debuts on HBO on Friday, December 25, 2026, streaming exclusively on HBO Max globally.

Production note: Location work has taken place at the London Zoo, Borough High Street in Southwark, and the Île de Sein in Brittany, France (around the Tévennec Lighthouse), in addition to principal photography at Leavesden.

Sources: Deadline, The Hollywood Reporter, CNN, Variety, Warner Bros. Discovery press materials.

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