"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.

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.

Discovery announced that a Harry Potter TV series was in the works. Updates on the HBO show have been shared sporadically, but it seems that it’s truly starting to take shape. To that point, it was reported earlier this month that John Lithgow was being eyed for the role of Albus Dumbledore.