After realtor, Peter Klaven (Paul Rudd), builds up the courage and pops the question to his girl friend Zooey (Rashida Jones), he is overjoyed with happiness. Although, it soon comes to Peter's attention that he has no friends worthy of being his best man, in fact, he doesn't have many friends at all. Peter quickly sets out on a mission to find a friend, going on "Friend dates" set up by his family. However, he finds no one worthy of being a best man, that is until he meets Sydney Fife (Jason Segal) at an open house viewing. Sydney is a laid back, straight-talking guy and despite their clash in personalities they quickly hit it off. Soon enough they begin to spend lots of time together, but Peter's new found friendship has leaves Zooey feeling jealous. As Peter and Zooey's relationship begins to feel the strain, can Peter maintain his friendship with Sydney?

Hilarious bro-mance with a great supporting cast including a side-splitting cameo from Lou Ferrigno (The Incredible Hulk, King of Queens).