The HBO Harry Potter Series: Everything We Know So Far
A new Harry, a new Hermione and a decade-long adaptation. Our running summary of everything confirmed about the HBO television series.
This is a living post. We update it as new details are confirmed. Last updated: early July 2026.
The biggest thing to happen to the fandom in a decade is officially in production: HBO’s television adaptation of the full book series, with each season planned to cover roughly one book. Here is the state of play.
One book per season
The films compressed 4,000-odd pages into nineteen hours. The series has room to breathe, and a season per book means the subplots fans have mourned for twenty years finally have screen time. Peeves. S.P.E.W. The full Prince’s Tale. Teenage pacing that runs at the speed of actual teenagers. The stated plan is a faithful adaptation running as long as a decade.
The new trio
The casting search ran to tens of thousands of open-call auditions and landed on three newcomers: Dominic McLaughlin as Harry, Arabella Stanton as Hermione and Alastair Stout as Ron. The photos from the first day of production, McLaughlin in the glasses and grinning on a train, did precisely the emotional damage to millennial fans you would expect.
The adults at the staff table
The confirmed staff-room casting is genuinely stacked: John Lithgow as Dumbledore, Janet McTeer as McGonagall, Paapa Essiedu as Snape and Nick Frost as Hagrid, with Luke Thallon as Quirrell. Every one of these is the kind of choice that makes the prestige-television ambition feel real rather than promotional.
When can we watch it?
Filming began at Leavesden Studios, the same lot as the films, with the Studio Tour still open next door. HBO has pointed to a 2027 premiere for season one. That feels far away. It is also one Goblet-of-Fire-length re-read cycle, so you will manage.
The big questions we’re tracking
How faithful is “faithful”? Early signals suggest very. But a season per book for the 300-page early novels and the 800-page later ones is going to require interesting maths.
The John Williams question. No confirmation yet on whether “Hedwig’s Theme” carries over. It has to. Surely.
Peeves. Twenty years of injustice could end here. This blog maintains a strict pro-Peeves editorial line.
Getting ready
There is one correct preparation and it is a full series re-read. If you want the order that makes a re-read land differently from the first time through, our definitive re-read order argues for something other than 1 to 7.