Nicholas Hoult joins HBO’s Harry Potter as Gilderoy Lockhart

Nicholas Hoult is stepping into the magical world of Hogwarts, taking on the role of the charming but self-obsessed Professor Gilderoy Lockhart in HBO’s upcoming Harry Potter series.

The casting news was confirmed by HBO Max on Tuesday, August 11, adding another high-profile name to the growing ensemble of the highly anticipated reboot. Hoult will portray the Defense Against the Dark Arts professor in the show’s second season, succeeding Kenneth Branagh, who played the character in the original 2002 film adaptation of Harry Potter and the Chamber of Secrets.

Gilderoy Lockhart is introduced in the second Harry Potter story as a celebrated wizard who joins Hogwarts as the new Defense Against the Dark Arts teacher. Known for his confidence, charm and flamboyant personality, Lockhart has gained fame for writing books about his supposed heroic achievements.

However, his public image is far more impressive than his actual abilities. Throughout the story, his exaggerated claims and lack of competence become increasingly apparent, making him one of the more memorable and comedic characters in the Harry Potter universe.

Hoult’s addition further strengthens the star-studded cast of HBO’s new adaptation. The series features John Lithgow as Albus Dumbledore, Janet McTeer as Minerva McGonagall and Johnny Flynn as Lucius Malfoy.

The young stars leading the new generation of Hogwarts students include Dominic McLaughlin as Harry Potter, Arabella Stanton as Hermione Granger and Alastair Stout as Ron Weasley. Their casting has generated significant interest as audiences prepare to see the beloved story retold for television.

Production on the series began in July 2025, with the first season scheduled to premiere on HBO Max on December 25. The adaptation is expected to explore J.K. Rowling’s original books in greater detail than the films, allowing more room for characters, storylines and events that were previously condensed or omitted.

The Harry Potter franchise, however, continues to face controversy because of Rowling’s public comments about transgender issues. The author has faced criticism since 2020 over remarks that many viewed as transphobic. Rowling has rejected that characterization and has maintained that her views are focused on women’s rights.

Despite the controversy surrounding the author, Rowling remains involved with the television adaptation as an executive producer.

For Hoult, the Harry Potter role comes after another major franchise appearance. The actor recently portrayed Lex Luthor in James Gunn’s Superman and is expected to return as the iconic villain in the upcoming sequel, Man of Tomorrow, scheduled for release in 2027.

Hoult is also set to appear in How to Rob a Bank, which is slated for release on November 13, adding another major project to his increasingly busy film and television career.