Celebrity The Wolfpack is Back! The Hangover Part III Premieres in Los Angeles By Jennifer Davis Published on May 21, 2013 Pin Share Tweet Email Photo: Wenn; AP Images; Getty Images The wolfpack is back! Bradley Cooper, Ed Helms, and Zach Galifianakis premiered the third and final installment of The Hangover trilogy in Los Angeles last night, along with co-stars Jamie Chung (in Armani and Gaydamak jewels) and Heather Graham (in Herve L. Leroux). For the epic finale, the boys are back in Las Vegas for one last hurrah. What happens? Find out when The Hangover Part III opens nationwide Thursday, May 23. Click to see more party photos! MORE:• Most Stylish Hollywood Men• Cooper’s Number One Stylist: His Mom• Jamie Chung's Best Looks Was this page helpful? Thanks for your feedback! Tell us why! Other Submit