The Emmy-winning actor, hot off a SAG Award for "Conclave," said playing the Hogwarts headmaster would "define me for the last chapter of my life."

Cillian Murphy’s name has come up a lot, with rumors that he will play either Lord Voldemort or Professor Quirrell. “I May Destroy You” alum Paapa Essiedu is strongly rumored to be playing Severus Snape, while Ted Lasso’s Brett Goldstein has been named as a possibility for portraying Rubeus Hagrid.

Is John Lithgow playing the new Dumbledore? Here's what he said in an interview and why people are speculating.