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."John Lithgow is heading to Hogwarts.The 3rd Rock From the Sun star confirmed recent rumors that he'll be playing Professor Albus Dumbledore on HBO's forthcoming Harry Potter TV series in an interview with Screenrant published Tuesday.

John Lithgow has played everything from Don Quixote in Man of La Mancha to an extraterrestrial patriarch in 3rd Rock from the Sun. Next he will be the powerful, wise, and compassionate professor Dumbledore in HBO’s Harry Potter TV show. He confirmed the casting in a recent interview, saying it will “define me for the last chapter of my life.”

John Lithgow to play Albus Dumbledore in HBO's Harry Potter TV show. Lithgow has starred in numerous successful TV shows and movies throughout his career.

John Lithgow has revealed that he’s accepted the role of Albus Dumbledore in Max’s upcoming Harry Potter television adaptation. “Well, it came as a total surprise to me,” Lithgow told Screen Rant. “I just got the phone call up at the Sundance Film Festival for yet another film,

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.

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.