Harry Potter (film series) was that the principal cast be kept strictly British, allowing nevertheless for the inclusion of many Irish actors, such as 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. Rowling was hesitant to sell the rights because she "didn't want to give them control over the rest of the story" by selling the rights to the characters, which would have enabled Warner Bros. to make non-author-written sequels. Although Steven Spielberg initially negotiated to direct the first film, he declined
Harry Potter list of highest-grossing films worldwide. "Philosopher's Stone" was the highest-grossing "Harry Potter" film up until the release of the final instalment of the series, "Deathly Hallows", while "Prisoner of Azkaban" grossed the least. As well as being a financial success, the film series has also been a success among film critics. Opinions of the films are generally divided among fans, with one group preferring the more faithful approach of the first two films, and another group preferring the more stylised character-driven approach of the later films. Rowling has been constantly supportive of all the films and evaluated "Deathly Hallows" as