Washington-US actor John Lithgow takes on the role of headmaster Albus Dumbledore in a new TV series on the adventure of Magic apprentice Harry Potter. “I will be about 87 years old at the final party, but I still said yes,” said the 79-year-old to the online portal “Screenrant”. Lithgow was most recently seen in the Vatican thriller “Conclave”, which is nominated for eight Oscars.