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.

Here is everything we know so far about HBO’s “Harry Potter” TV series.

John Lithgow previously stated that he had been cast as Dumbledore, which HBO confirmed Monday, along with Janet McTeer as Minerva McGonagall, Paapa Essiedu as Severus Snape and Nick Frost as Rubeus Hagrid. Those four will all serve as series regulars.