John Lithgow has been spotted on the set of the upcoming Harry Potter TV series, portraying Professor Albus Dumbledore. The 79-year-old actor was seen wearing oversized robes and sporting a long white beard and hair, typical of the character. Lithgow’s casting was revealed earlier this year, and he has expressed both excitement and intimidation about taking on the iconic role. The series, which will adapt each of J.K. Rowling’s seven books into individual seasons, is set for a 2027 premiere on HBO. Other cast members include Dominic McLaughlin as Harry Potter, Nick Frost as Hagrid, and Warwick Davis reprising his role as Professor Flitwick.