Nicholas Hoult takes on iconic role in HBO's Harry Potter reboot

In the United States, the highly anticipated first season of HBO's reboot of the Harry Potter series has yet to be released, but casting for the second season is already in progress. On a Tuesday in August 2026, it was announced that British actor Nicholas Hoult has been cast in the role of Gilderoy Lockhart, a character known for his villainous traits in J.K. Rowling's 'Harry Potter and the Chamber of Secrets.' This character was originally portrayed by Kenneth Branagh in the 2002 film adaptation, which was a significant box office success, grossing over $883 million worldwide.

The decision to cast Hoult, who is recognized for his previous role as Lex Luthor in a 2025 Superman film, indicates HBO's commitment to bringing a fresh perspective to the beloved franchise. The character of Gilderoy Lockhart is a Hogwarts professor who teaches Defense Against the Dark Arts and is notorious for taking credit for the achievements of other wizards by erasing their memories. This portrayal is expected to add depth to the character, as Hoult has experience in playing complex roles.

The second season of the series was greenlit back in May 2026 and is set to begin filming in the fall, just months before the premiere of the first season, which is scheduled for Christmas. The casting of Hoult comes alongside other notable actors, including 11-year-old Dominic McLaughlin as Harry Potter, Alastair Stout as Ron Weasley, and Arabella Stanton as Hermione Granger. Nick Frost will portray Rubeus Hagrid, while John Lithgow takes on the role of Albus Dumbledore, and Janet McTeer will play Professor McGonagall.

The involvement of J.K. Rowling as an executive producer has also been highlighted, with the author expressing her enthusiasm for the adaptation. In a post on social media, she praised the first two episodes of the series, calling them 'SO, SO, SO GOOD.' This positive feedback from Rowling suggests that the series aims to stay true to the spirit of the original books while also exploring new interpretations of the characters and storylines. As the series progresses, fans are eager to see how these casting choices will impact the overall narrative and reception of the reboot.