The series was first announced back in 2023, when HBO first launched the new name for its streaming service, Max. It has yet to be officially confirmed that each season will span one novel, similar to Disney+’s “Percy Jackson and the Olympians” series, but each book does take place over a single school year, as did the movies.

John Lithgow has said that he’s “very excited” to be joining the upcoming “Harry Potter” series as Albus Dumbledore, brushing off criticism that the role of the wizarding headteacher has been given to an American actor.