Recently though stars of the series including Bradley Cooper, Ed Helms, and Zach Galifianakis, sat down with director Todd Phillips and put together an uncensored oral history of the making of the films:
It was called What Happens in Vegas. In 2007, screenwriters Jon Lucas and Scott Moore came up with a novel pitch: a bachelor party comedy that would play out as a mystery, with increasingly bizarre reveals leading to the location of the missing groom. New Line Cinema executives loved the idea but were dead set on that title and couldn’t secure rights, so they passed. Others weren’t interested. But Lucas and Moore wrote the script anyway and slipped it to fellow CAA client Todd Phillips.