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The Game of Thrones star replaces Nicholas Hoult as Gilderoy Lockhart and has already revealed how he plans to approach the role
Kit Harington will play Gilderoy Lockhart in the second season of HBO’s Harry Potter television series after Nicholas Hoult stepped away from the role.
Hoult’s departure was attributed to scheduling conflicts, with Harington now set to portray the Defence Against the Dark Arts professor when the adaptation reaches Harry Potter and the Chamber of Secrets. Variety’s report on the Gilderoy Lockhart recasting
The role will also be unusually familiar territory for Harington. The Game of Thrones actor has already performed as Lockhart in the full-cast Harry Potter audio editions, meaning his HBO appearance will be his second interpretation of the character.
Why is Kit Harington replacing Nicholas Hoult as Gilderoy Lockhart?
Nicholas Hoult left the Harry Potter production because of scheduling conflicts.
The available reporting gives slightly more context than that phrase alone. According to a person with knowledge of the situation cited by TheWrap, shifting production schedules eventually created clashes with Hoult’s other projects, and HBO released him from the role. TheWrap’s report on why Nicholas Hoult left Harry Potter
That is the clearest explanation currently supported by the reporting.
Hoult has other acting commitments, but no official statement from HBO or the actor has identified one particular project as the sole reason he could no longer play Lockhart. Daily Tuesday therefore should not present speculation about a specific film as established fact.
The change is particularly noticeable because Hoult had only recently been announced for the part.
The official Harry Potter announcement of Nicholas Hoult’s casting described him as the actor who would play the author-turned-Defence Against the Dark Arts teacher in the HBO series.
Harington has now taken over the role before Hoult’s version of Lockhart ever reached the screen.
What has Kit Harington said about playing Gilderoy Lockhart?
Harington has already commented on the casting and made clear that he is enthusiastic about playing the character.
In his first reaction following the announcement, Harington described himself as a long-time Harry Potter fan and said Lockhart is one of his favourite characters. He called being offered the television role “a real dream”. Read Kit Harington’s reaction to joining Harry Potter
His comments also reveal something important about what viewers can expect from his performance.
Although Harington has already voiced Lockhart, he said his live-action interpretation will not simply reproduce the version he created for the audiobook. He explained that the audio performance gave him a chance to become familiar with the character, but television will require a different approach.
That gives Harington an unusual starting point. He already knows the character while still having the opportunity to create a distinct version for HBO.
Kit Harington has already played Gilderoy Lockhart
Harington was announced as the voice of Professor Gilderoy Lockhart for Harry Potter: The Full-Cast Audio Editions before being cast in the television series.
The official Harry Potter audiobook casting announcement placed Harington alongside performers including Keira Knightley, Iwan Rheon, Ruth Wilson, Simon Pegg and James McAvoy.
Harington voices Lockhart in Harry Potter and the Chamber of Secrets, the story in which the character becomes Hogwarts’ new Defence Against the Dark Arts professor. His move to HBO’s television series therefore means he will portray the same character across two different adaptations.
There is another connection between the audio and television casts. Arabella Stanton voices Hermione Granger in the first three full-cast audiobooks and will also play Hermione in HBO’s television adaptation.
She will star alongside Dominic McLaughlin as Harry Potter and Alastair Stout as Ron Weasley, completing the new trio at the centre of HBO’s adaptation.
Who is Gilderoy Lockhart in Harry Potter?
Gilderoy Lockhart first becomes a major character in Harry Potter and the Chamber of Secrets.
He arrives at Hogwarts as the school’s new Defence Against the Dark Arts professor, but he is already famous before taking the teaching job.
Lockhart has built a celebrity reputation through books describing his supposed encounters with dangerous creatures and other magical adventures. He places enormous importance on his public image, appearance and fame.
However, his reputation does not necessarily reflect his abilities.
The official Harry Potter Encyclopedia entry for Gilderoy Lockhart describes him as a celebrity author whose experience and knowledge fail to live up to his extravagant claims.
His personality and the truth behind his carefully constructed reputation become important parts of the Chamber of Secrets story.
That also explains why searches for Gilderoy Lockhart have risen following the casting change. Harington is not taking on a minor background role but one of the second story’s most recognisable new characters.
Who played Gilderoy Lockhart in the Harry Potter films?
Kenneth Branagh played Gilderoy Lockhart in the 2002 film Harry Potter and the Chamber of Secrets.
Branagh’s performance established the character’s flamboyant and self-important screen personality for audiences of the original film series.
Harington will be creating a new version rather than continuing that portrayal because HBO’s programme is a fresh television adaptation of the books, not a continuation of the Warner Bros. films.
The new cast also includes John Lithgow as Albus Dumbledore, Janet McTeer as Minerva McGonagall, Paapa Essiedu as Severus Snape and Nick Frost as Rubeus Hagrid. HBO’s current official promotional material confirms those actors alongside the new Harry, Ron and Hermione.
When will Kit Harington appear in Harry Potter?
Harington is joining the series for Season 2, which will move the adaptation into the story of Harry Potter and the Chamber of Secrets.
Production on the second season is expected to begin in autumn 2026, according to current trade reporting. HBO has not yet announced a premiere date for the second season.
Before Harington’s Lockhart reaches television, viewers will see the programme’s first season, Harry Potter and the Philosopher’s Stone.
Warner Bros. Discovery has officially announced that the eight-episode first season will debut in Christmas 2026 on HBO and will stream on HBO Max in markets where the service is available, including the UK and Ireland. HBO’s official Harry Potter release announcement
Until HBO confirms a Season 2 release date, any specific date for Harington’s first live-action appearance as Gilderoy Lockhart would be speculation.