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.

John Lithgow attends The Old Man" Season 1 NYC Tastemaker Event at ... [+] MOMA on June 14, 2022 in New York City. (Photo by Jamie McCarthy/) The first confirmed actor in the upcoming Harry Potter live-action TV series is John Lithgow who will be playing Hogwarts headmaster and wizard legend,

"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.