Harry Potter HBO series: New trailer reveals Dominic McLaughlin as Harry, iconic Hogwarts moments and more

HBO has released a new trailer for its upcoming Harry Potter TV series, giving fans a closer look at the new generation of actors bringing J.K. Rowling’s Wizarding World to television. The series stars newcomer Dominic McLaughlin as Harry Potter, with Alastair Stout as Ron Weasley and Arabella Stanton as Hermione Granger.

Set to premiere on December 25, 2026, the new Harry Potter series will revisit the story of the Boy Who Lived, this time in a long-form television adaptation. The latest trailer features several familiar moments from Harry's first year at Hogwarts, while also offering glimpses of characters, locations and magical elements that fans will recognize from the books.

The trailer also features a new score by Hans Zimmer, adding a fresh musical identity to the Wizarding World while the series introduces a new cast to roles made famous by the original Harry Potter films.

What is the HBO Harry Potter series about?

The first season will focus on Harry Potter and the Philosopher's Stone, following Harry as he discovers that he is a wizard and begins his education at Hogwarts School of Witchcraft and Wizardry.

The official Season 1 logline reads: "There is nothing special about Harry Potter — or so his Aunt Petunia tells him. But when a mysterious letter of admission to Hogwarts School of Witchcraft and Wizardry arrives, it opens the door to a hidden world of magic, friendship and adventure. Yet behind Hogwarts’ enchanted walls lie dark secrets. Harry must find the courage to prove himself against the darkest wizard of all."

The new trailer showcases Harry, Ron and Hermione at Hogwarts, including familiar settings and classroom scenes such as Potions. It also provides a broader look at the magical world surrounding the young wizards.

Harry Potter HBO series cast

The HBO adaptation has assembled a large ensemble cast for Hogwarts and the wider Wizarding World.

Dominic McLaughlin plays Harry Potter, while Alastair Stout portrays Ron Weasley and Arabella Stanton plays Hermione Granger.

The Hogwarts faculty includes:

• John Lithgow as Albus Dumbledore
• Paapa Essiedu as Severus Snape
• Janet McTeer as Minerva McGonagall
• Nick Frost as Rubeus Hagrid
• Louise Brealey as Madam Hooch
• Paul Whitehouse as Argus Filch
• Luke Thallon as Quirinus Quirrell

The Dursley family includes Bel Powley as Petunia Dursley, Daniel Rigby as Vernon Dursley, and Amos Kitson as Dudley Dursley.

The Weasley family features Katherine Parkinson as Molly Weasley, with Tristan Harland, Gabriel Harland, Ruari Spooner and Gracie Cochrane playing Fred, George, Percy and Ginny Weasley.

Hogwarts students in the new Harry Potter series

The new adaptation also features a large group of Hogwarts students.

Among the Gryffindor students are Rory Wilmot as Neville Longbottom, Leo Earley as Seamus Finnigan, Alessia Leoni as Parvati Patil, and Sienna Moosah as Lavender Brown.

Other students include Orson Matthews as Oliver Wood, Asha Soetan as Angelina Johnson, Eire Farrell as Katie Bell, Serrana Su-Ling Bliss as Alicia Spinnet, and Ethan Smith as Lee Jordan.

Hufflepuff students include India Moon as Hannah Abbott, James Trevelyan Buckle as Justin Finch-Fletchley, Cian Eagle-Service as Ernie MacMillan, and Jazmyn Lewin as Susan Bones.

Ravenclaw is represented by Anjula Murali as Padma Patil, Aaron Zhao as Terry Boot, Scarlett Archer as Penelope Clearwater, and Eve Walls as Lisa Turpin.

The Slytherin students include Oliver Croft as Marcus Flint, D’Angelou Osei-Kissiedu as Graham Montague, Dylan Heath as Adrian Pucey, Cornelius Brandreth as Terence Higgs, Eddison Burch as Miles Bletchley, James Dowell as Lucian Bole, Henry Medhurst as Peregrine Derrick, and Laila Barwick as Pansy Parkinson.

Other notable cast members include Bertie Carvel as Cornelius Fudge and Leigh Gill as Griphook.

Who is making the new Harry Potter series?

The HBO series is being led by showrunner Francesca Gardiner, with Mark Mylod directing. Gardiner is also part of the writing team behind the adaptation.

Unlike the original Harry Potter movies, which condensed each book into a feature-length film, the HBO series is being developed as a television adaptation that can spend more time exploring the characters, Hogwarts and the wider Wizarding World.

When will the HBO Harry Potter series be released?

The new Harry Potter HBO series is scheduled to premiere in December 25, 2026. The show will introduce a completely new cast of actors to the roles of Harry Potter, Ron Weasley, Hermione Granger, Dumbledore, Snape, Hagrid and other beloved characters.

With the latest trailer offering a closer look at Hogwarts and the new cast, anticipation is building for HBO's television reboot of one of the world's most recognizable fantasy franchises.