Harry Potter and the Order of the Phoenix is the fifth book in the Harry Potter series of books by J. K. Rowling. The book was published on 21 June 2003 in the United Kingdom and the majority of other countries. It sold almost seven million copies in the United Kingdom and United States combined on that day. It has 38 chapters, is about 255,000 words long, and is the longest book in the series.
On 5 April 2006 Warner Brothers announced that the film of the same name, Harry Potter and the Order of the Phoenix, would be released in cinemas on 13 July 2007.