Lithgow's casting breaks tradition of British actors in Harry Potter, sparking debate. HBO's American casting decision opens more opportunities for diverse talent in series. Auditions for lead ...

John Lithgow is among the first actors to be cast in HBO's upcoming Harry Potter reboot series. He will play Professor Albus Dumbledore, the beloved headmaster of Hogwarts.

View Deal John Lithgow has done everything from Broadway shows to The Crown, where he won an Emmy for his role as Winston Churchill. Taking on the Harry Potter series is a new challenge for him.