Harry Potter cast rumours from Cillian Murphy as Voldemort to Wolf Hall star as Dumbledore

As HBO's Harry Potter series continues to take shape, there are rumours swirling about which actors might take on the iconic roles in the TV adaptation.

By Hannah McGreevy, Acting Assistant Screen Time Editor

Universal Studios announce The Wizarding World of Harry Potter

HBO is stirring the cauldron with its own take on the Harry Potter universe, building upon the spellbinding success of the blockbuster movies that raked in billions globally.

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Though no cast has been etched in stone, whispers of potential stars stepping into the adult wizarding shoes are swirling about.

Facing the ongoing speculation, HBO issued a statement: "We appreciate that such a high-profile series will draw a lot of rumour and speculation. As we make our way through pre-production, we will only confirm details as we finalise deals."

This follows the incredible influx of over 32,000 eager young hopefuls sending in their audition reels to be the next Harry, Hermione, or Ron, reports the Mirror.

Rumours about who might fill the shoes of some of Hogwarts' most icon characters are circulating - but which names are under consideration?

Mark Rylance could play Dumbledore (Image: GETTY)

Who is rumoured to play Dumbledore?

Albus Dumbledore, who is the beloved headmaster of Hogwarts school, was portrayed by the late Richard Harris in the first two Harry Potter films.

After that, the late Michael Gambon took over the role for the remaining six films.

Variety recently reported that Warner Bros has allegedly reached out to Mark Rylance of Wolf Hall fame to play Dumbledore in the reboot.

Cillian Murphy has been tipped for the role of Voldemort (Image: GETTY)
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Who is rumoured to play Voldermort?

Harry Potter’s terrifying villain, Lord Voldermort, was originally played by Ralph Fiennes in the film series, with the actor joining the cast for the fourth film onwards.

It has been rumoured that Fiennes has since endorsed Peaky Blinders star Cillian Murphy to take on the role.

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Brett Goldstein is rumoured to play Hagrid (Image: GETTY)

Who is rumoured to play Hagrid?

Rubeus Hagrid, the loveable half-giant that drops Harry off at the Dursleys’ house, is portrayed by the late Robbie Coltrane in the films.

For the TV series, Ted Lasso fans will be delighted to hear that Brett Goldstein is rumoured to be first choice to star as the kind-hearted gamekeeper.

Paapa Essiedu could be next to play Snape (Image: GETTY)

Who is rumoured to play Professor Snape?

Despite his many clashes with Harry throughout his time at Hogwarts, Severus Snape is a character who is beloved by many Harry Potter fans.

The Potions Master was originally played by the late Alan Rickman in the films, and it has been rumoured that I May Destroy You’s Paapa Essiedu might take on the role next.

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Sharon Horgan could be in the running for the part (Image: GETTY)

Who is rumoured to play Professor McGonagall?

Professor Minerva McGonagall was originally played by the late Dame Maggie Smith, whom many will also remember for her role in ITV’s Downton Abbey.

It seems Bad Sisters star Sharon Horgan and Oscar winner Rachel Weisz may both be in contention to fill the shoes of the legendary actress.

The new Harry Potter series is expected to debut on Max and the HBO and Warner Bros Discovery streaming service in 2026.

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