The role is Dumbledore, the most central figure to Harry Potter other than the trio of Harry, Ron and Hermione. But there's a bit of a problem.

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.

And while very little about the TV run has actually been confirmed so far, a Hollywood legend is said to be nearing a deal to be cast as Professor Albus Dumbledore. Following in the footsteps of Richard Harris, Jude Law, and Michael Gambon, it seems John Lithgow will be next to play the Hogwarts head teacher.