Last year the London cityscape provided a stunning backdrop to the latest James Bond film Skyfall.
But now there's a new movie in which the capital plays a starring role.
Welcome to the Punch is a crime thriller filmed in places like Canary Wharf and the east end.
Rags Martel has been to speak to actor James McAvoy about the film.
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David Cameron said the Met proved it can "do more with less" and declined to criticise the Mayor of London for his water cannon spend.
A group of disabled activists threw toys and balls at him as he entered the conference.
A wet start to the week and the unsettled weather is set to continue over the next few days.