Where is Brad Pitt?

A strange question, you may say.
Rumour and the local rag have it that Mr Pitt is filming a zombie movie called "World War Z" in Tunbridge Wells at the end of July.  I still like Mr Pitt despite his recent weirdy-beardy ways, and Hubby is into zombies (not in a biblical way, you understand); so this is right up our street, and not just literally.
By my reckoning it's the end of July.  I dropped Hubby of at the station this morning, right by the site of the supposed filming and there is no sight of Brad Pitt or any of his Hollywood cronies!
Where is he?
Why are we, and especially Hubby, too lazy to apply to be zombie extras?