Actor Brad Pitt peers from a car on the set of zombie movie World War Z as filming gets under way in Glasgow.

The film is set in Philadelphia so fake signs - including this one for the city's famous suspension bridge - and false shop fronts have been erected on the city's streets.

A cast and crew of about 1,200 people - including hundreds of local extras - are shooting scenes in Glasgow's George Square, and other city centre locations.

Filming for the Paramount Pictures movie, due for release next year, has already taken place in Valletta in Malta and in Falmouth in Cornwall, but continues in Glasgow which has a grid system of streets similar to that of Philadelphia.

Dozens of signs have been brought in to make the street scene look identical to the US city.

An actor dressed as a police officer gets ready for his scene. VisitScotland believes the film - due for release next year - could well generate huge interest in Scotland from fans around the world.

Yellow cabs line the streets of the city as it emerges that the production on World War Z could rake in more than £2m for the local economy. Creative Scotland - the agency charged with maximising the economic benefits of filming - also estimates a film like World War Z can bring in £30,000 a day on hotels, car hire and other production costs.