|Eric Christian Olsen||Kenny|
|Lauren Lee Smith||Lisa|
|Ellen David||Izzy's Mother|
|Harold Ramis||Professor Bowler|
Four friends face the prospect of turning 30 and losing the freedom of their youth. For one, Michael, the transition is especially difficult; although he is in love with Jenna, the mother of his child, his panicked reaction to the onset of adult responsibilities sends him into the arms of another woman .