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 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.