All the news on HBO's streaming 'Harry Potter' TV series, including cast, release date, how to watch, development and whether J.K. Rowling will be involved.

The premium cabler is in talks with John Lithgow to play Albus Dumbledore, the headmaster of the Hogwarts School of Witchcraft and Wizardry. News of Lithgow’s potential involvement follows THR ‘s reporting that British actor Paapa Essiedu ( I May Destroy You) is in discussions to play Professor Severus Snape. HBO declined to comment.

The two-time Oscar nominee, who has played the likes of Winston Churchill and Roald Dahl before, could become the first confirmed named for the new show.