Brad Pitt's "World War Z" Workday

Working hard on the set of his latest project, Brad Pitt filmed scenes for "World War Z" in London, England earlier today (August 8).

Surrounded by the action flick's cast and crew, the father of six sported aviator sunglasses, a gray jacket and jeans as she shot the day's footage.

Meanwhile, alleged details of Brad's relationship with Angelina Jolie while still married to Jennifer Aniston and working on the film "Mr. & Mrs. Smith," are coming to print in a new book written by the movie's producer, Arnon Milchan.

In "Confidential: The Life of a Secret Agent Turned Hollywood Tycoon," Arnon disputes Jolie's plea that she would never sleep with a married man, writing, "At first, Jen didn't believe he was involved with Angelina. She started asking around but no one would tell her anything because they were loyal to Brad, so she asked him point blank. He denied it. He eventually admitted he was in love with Angelina. Jen was furious and threw him out."

The book goes on to say that Pitt only returned to his joint home with Aniston to remove his belongings before moving in with Milchan, where he could easily sneak into work each day, as the text reads, "Brad drove each day to the set, and everywhere else, on a motorcycle and he wore a wraparound helmet with a tinted visor so no one would recognize him. He stayed with me for the duration of filming."

Enjoy the pictures of Brad Pitt on the London, England set of "World War Z" (August 8).