Celebrities on Set for the Week of Aug. 18, 2011

Celebrities were hard at work on movie projects this week. Brad Pitt arrived in Glasgow to film action scenes for World War Z, while Sarah Michelle Gellar took to the beaches of Malibu to shoot Ringer. Chris Evans jumped across cars in Cleveland, OH, for The Avengers, and Jake Gyllenhaal was back on the streets of LA for End of Watch — click through to see who else was on set!