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.

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.

John Lithgow being cast as Dumbledore in the upcoming "Harry Potter" series is more significant than you might think

One thing about John Lithgow that is undeniable is that he is very much not English. Nevertheless, he's been picked to play the very, very English icon Dumbledore in HBO's upcoming "Harry Potter" series.

In an interview with ScreenRant, American actor John Lithgow confirmed that he will portray Dumbledore in the new Harry Potter series currently in production by HBO.