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 £75 and 100 million ($150–200 million).[3][4]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, and was the first Potter film to be released in IMAX 3-D.
Daniel Radcliffe as Harry Potter, the protagonist. He has to battle with much of the Wizarding world's denial over Harry's encounter with the evil Lord Voldemort at the end of the previous year. He teaches his friends to defend themselves in duels.
Emma Watson as Hermione Granger, one of Harry's best friends. She helps Harry found Dumbledore's Army and accompanies Harry to the Department of Mysteries in the climax of the film.
Ralph Fiennes as Lord Voldemort, the antagonist, who lures Harry to the Ministry of Magic and nearly kills him.
One cut Goldenberg had to make, which he "hated" to do, was the absence of Quidditch, the Wizarding sport. "The truth is that any movie made of this book, whoever made it, that had included the Quidditch subplot would have been a lesser film", he said. In the book, Ron grows as a character by trying out for the Quidditch team. "Ron facing challenges and coming into his own in the same way that Harry is, we tried to get that into the film in other ways, as much as possible. So, you feel like, if not the details of that story, at least the spirit of it is present in the film". The change disappointed actor Rupert Grint who had been "quite looking forward to the Quidditch stuff".
In Harry Potter and the Half-Blood Prince, it is stated that Morfin Gaunt was buried in the ground beside Azkaban. In contrast to this, the Order of the Phoenix film shows Azkaban to be surrounded by ferocious waves.