HBO’s Harry Potter TV series has the chance to fix mistakes made by the film franchise, yet one big oversight won’t be redone for another ten years.

Here's everything to know about HBO's 'Harry Potter' series, which may have recently cast its new Dumbledore After seven books, eight movies, one play and a whole spin-off series, Harry Potter is debuting on the small screen for the first time.

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.

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

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.”

HBO’s upcoming “Harry Potter” series has found its Professor Albus Dumbledore in actor John Lithgow — known for his previous roles in “Conclave,” “The Crown” and “Footloose.” Lithgow confirmed to Screenrant that he had committed to the role as Headmaster of Hogwarts School of Witchcraft and Wizardry.

A New York native is stepping into the robes of Albus Dumbledore.HBO’s upcoming Harry Potter series will feature none other than Rochester-native John Lithgow as the beloved Hogwarts headmaster, the actor confirmed to Screen Rant.

Those three little words from John Lithgow confirming his intention to play Albus Dumbledore in the upcoming Harry Potter TV show made me lose all respect for him. The 79-year-old actor – known for his roles in 3rd Rock From the Sun,

When asked about the offer to play Dumbledore, Lithgow described the decision as "not easy," recognizing it could define the final phase of his illustrious career.