Harry Potter and the Order of the Phoenix is a 2007 fantasy adventure film, based on the novel of the same name by J. K. Rowling. Directed by David Yates, produced by David Heyman's company Heyday Films, and written by Michael Goldenberg, it is the fifth film in the popular Harry Potter film series. The story follows Harry Potter in his fifth year at the magic school Hogwarts. The Ministry of Magic refuses to believe the return of Lord Voldemort and appoints bureaucrat Dolores Umbridge as a teacher at the school.

Live-action filming took place in England and Scotland for exterior locations and Leavesden Film Studios in Watford for interior locations from February to November 2006, with a one-month break in June. Post-production on the film continued for several months afterwards to add in visual effects. The film's budget was reportedly between GB£75 and 100 million (US$150–200 million). Warner Bros., the distributor of the film, released it in the UK on 12 July 2007, and in the US on 11 July, both in conventional and IMAX theatres.

It is the unadjusted seventh-highest grossing film of all time, and a critical and commercial success, acclaimed as "the best one yet" by Rowling, who has consistently offered praise for the film adaptations of her work. In general, critics received the film well. Peter Travers of Rolling Stone called the film "the best of the series so far, [1] the laughs, the jitters and the juice to make even nonbelievers wild about Harry". The film opened to a worldwide 5-day opening of $333 million, third all-time, and grossed $939 million total, the second to Pirates of the Caribbean: At World's End for the greatest total of 2007.