Actor Brad Pitt films a scene from “World War Z” in Glasgow City centre on August 18, 2011 in Glasgow, Scotland. The film, which is set in Philadelphia, will be shot in various parts of the city transforming it into ruins to shoot a post apocalyptic zombie film. (Photo by Jeff J Mitchell/Getty Images)

A ship being used for the filming of World War Z sets sail from Falmouth Harbour on August 4, 2011 in Falmouth, United Kingdom. The Cornish coastal town is currently being used to film the zombie film that stars Brad Pitt. (Photo by Matt Cardy/Getty Images)