Harry Potter fans have become furious with American pay television network HBO after they shared an advert that called on children between the ages of nine and 11 to audition for the upcoming series. Back in February, the company took to their X account and shared: “Your Hogwarts letter is here. Max has ordered the first ever Harry Potter scripted television series, a faithful adaptation of the iconic books.” Warner Bros Discovery CEO David Zaslav later confirmed that the first instalment of the show will hit HBO Max in 2026, and said: “We’ve not been shy about our excitement around Harry Pott…