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 11 million units in the first twenty-four hours of release. The series has also gathered adult fans, leading to the release of two editions of each "Harry Potter" book, identical in text but with one edition's cover artwork aimed at children and the other aimed at adults. Besides meeting online through blogs, podcasts, and fansites, "Harry Potter" super-fans can also meet at "Harry Potter" symposia. The word "Muggle" has spread beyond its "Harry Potter" origins, becoming one of few pop culture words to land in the Oxford English Dictionary. The Harry Potter fandom has embraced podcasts as a regular, often