Shared with you
Director Cameo
Roman Polanski: The neighbor who opens the door to take a look at what is happening in the hallway.
This film is set in real time, without breaks and, with the exception of the park scenes at the beginning and end, in a single location. The light outside visibly changes during the running time and it's slowly getting darker, adding another layer of realism to the film.
Christoph Waltz worked with a voice coach to affect an American accent for Alan, although his Austrian accent occasionally slips through such as the German pronunciation of "Walter."
This film cast includes three Oscar winners: Jodie Foster, Kate Winslet and Christoph Waltz; and Oscar nominee John C. Reilly.