Harry Potter and Nielsen should have created a separate game-show list when "Who Wants to Be a Millionaire?" dominated the ratings. In 1998, Rowling sold the film rights of the first four "Harry Potter" books to Warner Bros. for a reported £1 million ($1,982,900). Rowling demanded the principal cast be kept strictly British, nonetheless allowing for the inclusion of Irish actors such as the late Richard Harris as Dumbledore, and for casting of French and Eastern European actors in "Harry Potter and the Goblet of Fire" where characters from the book are specified as such. After many directors including Steven Spielberg, Terry
Harry Potter and the Prisoner of Azkaban (film) and Sirius. The present Harry realises that it was actually him who conjured the Patronus, and does so again. Harry and Hermione rescue Sirius, who escapes with Buckbeak. Exposed as a werewolf, Lupin resigns from teaching to prevent an uproar from parents. Sirius sends Harry a Firebolt broom, who happily takes it for a ride. With "Prisoner of Azkaban", production of the "Harry Potter" films switched to an eighteen-month cycle, which producer David Heyman explained was "to give each [film] the time it required." Chris Columbus, the director of the previous two films, decided not to return to helm the