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."

It seems John Lithgow spilled the (Bertie Bott's Every Flavor) beans about his involvement in HBO's in-the-works 'Harry Potter' series. 'A total surprise to me,' he says.

"It's going to define me for the last chapter of my life, I'm afraid. But I'm very excited," the veteran actor said of the iconic role.

John Lithgow confirming he's been casted as Dumbledore in the new Harry Potter series will break major JK Rowling rule on sourcing British and Irish actors.

The actor who will play the role of Dumbledore in the Harry Potter TV show has been confirmed and in this article, find out who it is!

John Lithgow delightfully confirmed his involvement in the upcoming Harry Potter TV show during an interview. While speaking with Screen Rant, he recalled just how he found out he landed the gig, before sharing his feelings about signing on.

Everything we know about the long-awaited 'Harry Potter' TV series, including all the major cast updates, plot and expected release date.

For a while now, we've known that HBO was planning to make a TV series based on the Harry Potter books by J.K. Rowling, already famously adapted as a series of eight movies released between 2001 and 2011.