Alan (ZACH GALIFIANAKIS), Phil (BRADLEY COOPER), Stu (ED HELMS) and Doug (JUSTIN BARTHA) head t …

Alan (ZACH GALIFIANAKIS), Phil (BRADLEY COOPER), Stu (ED HELMS) and Doug (JUSTIN BARTHA) head to Las Vegas in Warner Bros. Pictures’ and Legendary Pictures’ comedy “The Hangover.” (Warner Bros. Pictures)