In a surprisingly inventive comedy that doesn't rely on cheap, gross-out laughs, a stag do in Las Vegas for about-to-be-wed Doug (Justin Bartha) takes a turn for the unusual. This terrific romp from Old School director Todd Phillips sees Doug's three friends (Bradley Cooper, Ed Helms, Zach Galifianakis) wake up after the excessive night before with no sign of the prospective groom and no memory of the evening's events. What they do have is a wrecked hotel suite occupied by a baby and, more worryingly, a tiger. As the befuddled buddies go back over the trail of their wild night (which includes encounters with Heather Graham's stripper and Mike Tyson, playing himself), they soon discover how extreme their escapades have been. It's cleverly plotted and packed with believable dialogue and hilarious situations, which effectively blend the deadpan with the hysterical. If Superbad and Knocked Up were the comedies of 2008, then The Hangover is surely one of the funniest of 2009, if not the last decade.

When three friends finally come to after a raucous night of bachelor-party revelry, they find a baby in the closet and a tiger in the bathroom. But they can't seem to locate their best friend, Doug – who's supposed to be tying the knot. Launching a frantic search for Doug, the trio perseveres through a nasty hangover to try to make it to the church on time.