Any time you talk about the look of the film, it's not just the director and the director of photography. You have to include the costume designer and the production designer.
“Kids are so fiercely opinionated, that if they love the Harry Potter books and they go see the movie, they'll be the first to say, 'That was wrong! They didn't get that right!' They're storytellers themselves. They're critics. They're going to have the critical opinion.”