John Lithgow will play the Hogwarts headmaster in the HBO show, with Paapa Essiedu filling the role of Severus Snape.John Lithgow will play the Hogwarts headmaster in the HBO show, with Paapa Essiedu filling the role of Severus Snape. Read More
‘Harry Potter’ HBO Series Casts Dumbledore, Hagrid and More Major Roles
