HBO’s Harry Potter series is filling in the parts of Hogwarts that make the castle feel alive. The newest casting covers the ghosts, a talking portrait and the most important hat in the wizarding world. Leo Bill plays Nearly Headless Nick, Andrew Brooke plays the Bloody Baron, Daniel Fearn plays the Fat Friar, and Laura Smyth plays the Fat Lady, whose portrait guards Gryffindor Tower. David Threlfall voices the Sorting Hat, which effectively gets the first word on every new student’s future.
These are supporting roles, but they carry weight with fans. Nearly Headless Nick, played by John Cleese in the 2001 film, is one of the friendliest faces Harry meets in his first year. The Bloody Baron, by contrast, barely registered on screen. The Fat Friar and the Fat Lady were reduced to brief cameos. A television series has the room to give these characters more than background duty, and casting named actors rather than extras suggests HBO plans to use them. Notably, Ravenclaw’s Grey Lady hasn’t been announced. Neither has Peeves the poltergeist, whom the films cut entirely and whom book readers still bring up.
The newcomers join a large cast that has been coming together for some time. Dominic McLaughlin plays Harry, with Arabella Stanton as Hermione and Alastair Stout as Ron. The adults are led by John Lithgow as Dumbledore, Janet McTeer as McGonagall, Paapa Essiedu as Snape and Nick Frost as Hagrid. Warwick Davis returns to the franchise as Flitwick, the same role he played in the films, which offers a small link to the original adaptations.
One detail in the cast list stands out. Gracie Cochrane is credited as Ginny Weasley for the first season, while Bonnie Hill was announced earlier for the same role in Season 2. HBO hasn’t explained the split. It may reflect Ginny’s larger part in Chamber of Secrets, but that’s unconfirmed. The Season 2 lineup also includes Kit Harington as Gilderoy Lockhart and Lenny Rush as Dobby, a sign that production is already looking well beyond the first book.
Francesca Gardiner writes the series and serves as showrunner. Mark Mylod, known for directing Succession, directs several episodes. J.K. Rowling is among the executive producers alongside David Heyman, who produced all eight films.
Harry Potter and the Philosopher’s Stone premieres on 26 December 2026 and will stream exclusively on OSN+ across the region. A post-Christmas release suggests HBO expects families to watch together. The question is whether a new cast can make audiences forget the faces that defined Hogwarts for a generation.