Unlucky in *ahem* 'love'? Looking for that special someone (for the night anyway)? Well, John (Wilson) and Jeremy (Vaughn) have the plan for you!
First, as the title of the movie suggests, crash a wedding. Second, make sure you have appropriate phoney names and made up backgrounds so that the presence of you both is plausible and your story isn't too obvious. Third, find an attractive woman who looks like she's feeling moved due to the romantic circumstances and make your move. Bingo! Instant hilarity!
Warning: Make sure you don't break the rules and fall for an eccentric politician (Walken)'s daughter (McAdams) or you might find yourself in way over your head-