There are few better ways to introduce the atmosphere of Hogwarts than through the people who never quite left it.
The castle's ghosts have spent generations watching new students arrive, get into trouble and discover that magical education involves rather more danger than anyone initially expected.
HBO has now announced the performers who will bring three of those ghosts to its upcoming Harry Potter television series.
The network also revealed the actress portraying the Fat Lady, a familiar enchanted portrait, and the actor who will voice the Sorting Hat.
The announcement was published on October 30, 2026, just before Halloween.
It was confirmed through Warner Bros. Discovery's official press channels and reported by Variety, TheWrap and UPI.
The five additions belong to the first season, which adapts Harry Potter and the Philosopher's Stone and is scheduled to premiere on December 25.
Leo Bill will play Nearly Headless Nick
Leo Bill has been cast as Sir Nicholas de Mimsy-Porpington, better known to Hogwarts students as Nearly Headless Nick.
Nick is the resident ghost of Gryffindor House.
He is generally courteous, enthusiastic about speaking with students and unusually sensitive about the circumstances surrounding his death.
His nickname refers to the fact that his head was never entirely separated from his body.
The character introduces Harry to an aspect of the wizarding world that has little to do with classroom spells.
At Hogwarts, ghosts are not simply frightening figures appearing in the background.
They have their own personalities, concerns, friendships and histories.
Bill's credits include Tim Burton's Alice in Wonderland and the British supernatural series The Living and the Dead.
In the original Harry Potter films, Nearly Headless Nick was portrayed by John Cleese.
Bill will therefore offer a new interpretation of a character already strongly associated with a familiar comedic presence.
No verified official image has yet established exactly how he will look as the ghost in the series.
Andrew Brooke becomes the Bloody Baron
Slytherin House will have a considerably more intimidating representative.
Andrew Brooke has been cast as the Bloody Baron.
Unlike the generally friendly Nick, the Baron is known for his disturbing appearance and stern manner.
He holds a distinctive place among the castle's ghosts.
The original books also provide a tragic history for the character, although the first season is not necessarily expected to reveal every detail.
Brooke has appeared in PhoneShop and The Agency.
His casting establishes another of the house ghosts in the show's first year.
The production has not disclosed how many scenes he will appear in or which elements of his wider history will be explored.
Those questions will have to be answered by the finished episodes rather than inferred from the announcement.
Daniel Fearn joins as the Fat Friar
Daniel Fearn will play the Fat Friar, the resident ghost of Hufflepuff.
The character is usually associated with a warmer and more approachable personality than the Bloody Baron.
His presence helps demonstrate the variety of supernatural inhabitants found throughout Hogwarts.
Not every ghost exists to frighten children or reveal a terrible secret.
Some are simply part of everyday school life.
Fearn's credits include Slow Horses and Things You Should Have Done.
The October 30 announcement confirms three house ghosts: Gryffindor's Nearly Headless Nick, Slytherin's Bloody Baron and Hufflepuff's Fat Friar.
It does not include Ravenclaw's Grey Lady.
That omission should not be interpreted as confirmation that the Grey Lady will never appear in the adaptation.
HBO has simply not included her among these five newly announced performers.
Laura Smyth will portray the Fat Lady
Laura Smyth is taking on the role of the Fat Lady, one of the most recognizable portraits in the Harry Potter books.
The character guards the entrance to Gryffindor Tower and generally requires students to provide the correct password before entering their common room.
She is an essential part of the castle's eccentric everyday routines.
Hogwarts paintings are not ordinary decorations.
Their subjects can speak, react to visitors and sometimes travel between portraits.
The Fat Lady provides a particularly memorable example of that magical logic.
Elizabeth Spriggs portrayed the character in the first film, while Dawn French took over in Harry Potter and the Prisoner of Azkaban.
Smyth, who appeared in Baby Reindeer and has a background in British comedy, will now bring her own interpretation to the role.
The production has not yet shown how her performance will be incorporated into the moving portrait.
It remains unclear whether the new series will change the character's appearance or presentation in any substantial way.
David Threlfall is the new voice of the Sorting Hat
The fifth casting announcement concerns an object rather than a human-looking character.
David Threlfall will voice the Sorting Hat.
The actor is known for his portrayal of Frank Gallagher in the original British version of Shameless and for his work in Nightsleeper.
The Sorting Hat is responsible for assigning first-year Hogwarts students to Gryffindor, Slytherin, Hufflepuff or Ravenclaw.
Its judgment is an important part of the school's traditions.
The ceremony also establishes some of the values and rivalries that will shape Harry's relationships throughout the story.
For Harry himself, being sorted into a house represents a crucial moment in his introduction to the wizarding world.
The hat's role therefore extends beyond a piece of unusual magical clothing.
It introduces the structure through which students understand much of their school experience.
In the original films, the Sorting Hat was voiced by Leslie Phillips.
Threlfall will take over that vocal performance for HBO's adaptation.
The official announcement specifically identifies a voice role, not a conventional onscreen human character.
Hogwarts depends on more than its leading characters
None of these five additions will replace Harry, Hermione or Ron as the center of the story.
Nor do the ghosts occupy the same narrative position as Dumbledore, Snape or Hagrid.
But they are important to the character of Hogwarts itself.
J. K. Rowling's fictional school is defined by its sense of history and the impression that extraordinary things have been happening there for centuries.
Its moving staircases, secret passages, magical portraits and supernatural inhabitants all contribute to that identity.
The ghosts suggest that each house possesses traditions extending beyond the lives of its current students.
The Sorting Hat introduces those houses through a ceremony that shapes the pupils' entire school experience.
The Fat Lady turns the simple act of entering a dormitory into another memorable magical encounter.
These elements make the school feel like a functioning place rather than merely a backdrop for the main characters.
A television adaptation potentially has room to revisit recurring details across multiple episodes.
That does not establish how often each newly announced performer will appear.
HBO has confirmed the roles but has not released a complete scene-by-scene account of their participation.
The new cast joins an extensive ensemble
The first season of HBO's Harry Potter is adapting the opening novel, Harry Potter and the Philosopher's Stone.
Dominic McLaughlin plays Harry Potter, Arabella Stanton portrays Hermione Granger and Alastair Stout takes on Ron Weasley.
The trio follows Daniel Radcliffe, Emma Watson and Rupert Grint, whose performances shaped the eight original feature films.
John Lithgow has been cast as Albus Dumbledore, Janet McTeer as Minerva McGonagall and Paapa Essiedu as Severus Snape.
Nick Frost plays Rubeus Hagrid, while Warwick Davis returns to the franchise as Filius Flitwick.
The new ghost and portrait announcements illustrate the scale of reconstructing the wizarding world for television.
The adaptation needs not only its leading students and teachers but also the many recurring figures who make Hogwarts recognizable.
Each new casting confirmation helps establish another part of that environment.
Francesca Gardiner leads the adaptation
Francesca Gardiner is writing and executive producing the first season.
Mark Mylod is directing multiple episodes and also serves as an executive producer.
Both previously worked on HBO's Succession, although Harry Potter represents a very different genre and storytelling challenge.
The series is produced in association with Brontë Film and TV and Warner Bros. Television.
J. K. Rowling serves as an executive producer, alongside Neil Blair, Ruth Kenley-Letts and other members of the production team.
HBO has described the series as a faithful adaptation of the books.
That intention does not establish precisely which scenes will be expanded, removed or restructured.
The inclusion of recognizable supporting characters does suggest that the production is paying attention to details beyond the central storyline.
How those details function within the episodes will become clear only when the season premieres.
Harry Potter premieres on Christmas Day
The first season is scheduled to debut on December 25, 2026.
Warner Bros. Discovery reiterated that date in its official October 30 casting announcement.
The series will air on HBO and stream through HBO Max in supported territories.
It is not yet available as of October 31.
The latest casting update does not change the announced release schedule.
Nor does it establish the precise distribution calendar for every international market.
The project has already been renewed for a second season, which will adapt Harry Potter and the Chamber of Secrets.
However, this particular announcement concerns five roles in Season 1.
It does not confirm that every newly announced performer will return for subsequent seasons.
The actors are confirmed, but their final appearances remain to be seen
The announcement answers several casting questions without revealing everything about the performances.
HBO has identified the actors behind Nearly Headless Nick, the Bloody Baron, the Fat Friar, the Fat Lady and the Sorting Hat.
It has not fully demonstrated how each ghost will appear on screen or which visual-effects techniques will shape their performances.
The same applies to the animated portrait and the Sorting Hat.
Casting photographs are not the same as completed character imagery.
It would also be premature to assume that every scene from the original novels will be reproduced exactly.
What is confirmed is straightforward: Leo Bill, Andrew Brooke, Daniel Fearn, Laura Smyth and David Threlfall are joining the first season of HBO's Harry Potter adaptation.
Their characters are part of the distinctive atmosphere that separates Hogwarts from an ordinary boarding school.
The challenge will be making those magical inhabitants feel as memorable as the young students arriving at the castle for the first time.
Audiences will begin discovering the result on December 25.
