Bradley Cooper: Ponytail on 'Hangover Part III' Set!

The Wolf Pack is back – Bradley Cooper, Zach Galifiankis, Justin Bartha, and Ed Helms walk around the set of their upcoming flick The Hangover Part III on Tuesday (September 11) in Los Angeles.

Bradley, 37, wore his hair in a short ponytail along with a U.S. Open visor around his head.

The Hangover Part III is set to be released on May 24, 2013. The comedy will follow the continuing misadventures of friends, Phil (Cooper), Stu (Helms), and Alan (Galifianakis).

FYI: Bradley and Zach are wearing Sanuk footwear.

10+ pictures inside of Bradley Cooper and his Hangover Part III castmates on set…