According to TVLine, CEO and Chairman of HBO, Casey Bloys (Less Than Perfect) discusses the young Harry Potter series’ stars and how the production will explore their growth spurts. This September, the streaming service released a casting call for children who will be 9 to 11 years old by April 2025 to play Harry Potter, Ron Weasley and Hermione Grangerfor the TV show based on J.K. Rowling’s (The Running Grave, The Cuckoo’s Calling) novels. A concern comes to mind when it comes to growth, as shows such as Stranger Things often film for two or three years in between different seasons. Audiences can clearly tell the difference between a character’s age on screen and the actor’s age.

No further details were revealed about casting and production for the Harry Potter series. In 2023, the show was officially ordered and was given a 10-year commitment by HBO. However, it is still unclear if the gap means the show will stream for ten seasons or be in production for ten years via TVLine.

“It is something we’re thinking about,” Bloys stated in a recent press conference. “One of the ideas we talked about was shooting the first season and the second season very close to each other time-wise, because 11 to 13 is a big jump in kids’ lives. You can get away with 13 to 15, something like that. So we’re going to have to think about scheduling and shooting so that they don’t grow too much between seasons. It is a consideration.”

Even though David Zaslav (The Adventures of Tachy Dixon, The Lord of the Rings: The Hunt for Gollum), the Warner Bros. Discovery boss, mentioned a 2026 premiere, Bloys confirms there is no exact release date.“When we started the whole thing, we kind of laid out, ‘Oh, it could probably be ’27, something like that,’” he shared. “But don’t hold me to any of that, because we’re just getting started in the writing and casting process.”

Bloy also expresses his thoughts on new season drops every year and how that will be highly unrealistic. “I think an annual schedule will be tough, but it depends on how much is written ahead of time.”

TVLine states Francesca Gardiner (Killing Eve, His Dark Materials) is the showrunner, writer and executive producer of the Harry Potter series. Mark Mylod (The Menu, The Big White) will serve as an executive producer with Gardiner and Rowling and one of the directors of select episodes.