Finally! Potter fans have a sneaky peek of what's in store for the third Potter film, Prisoner of Azkaban.
A photo of the Knight Bus from chapter three of Azkaban has appeared, even though we know for sure proper filming doesn't start until next week.
The bus, which can go anywhere, except underwater, was spotted in the London area. It was being used in some pre-production work also involving Harry himself - Dan Radcliffe.