The series which comes 23 years after the franchise's first film, Harry Potter and the Philosopher's Stone was first released, will explore each book in depth over a planned 10-year run.
It was announced last year that there would be a HBO series of Harry Potter and fans of the wizard have been waiting patiently ever since for more information.
I just got the phone call up at the Sundance Film Festival for yet another film, and it was not an easy decision because it's going to define me for the last chapter of my life, I'm afraid.
Meanwhile, Mark Mylod, who worked on HBO's Game of Thrones and The Last of Us, will direct several episodes for HBO and Warner Bros' streaming service, Max.
There has been much speculation about who would take on the role of Albus Dumbledore after Harris and Gambon's epic portrayal in the film franchise.
