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Bradley Cooper, Ed Helms and Zach Galifianakis wake up in their trashed Las Vegas hotel room after their best friend Justin Bartha’s stag night.

They soon discover that they’ve lost him – and their memories of the night before – but managed to gain a tiger, a chicken and a baby!

The trio’s bleary-eyed efforts to find the groom, get him to the church on time with only five hours to spare and return the lost property is the making of a genuinely hilarious movie that includes a sweet hooker (Heather Graham), boxer Mike Tyson and a very angry Ken Jeong.