Leighton Meester as Rebecca Evans

Minka Kelly as Sara Matthews

Cam Gigandet as Stephen

Aly Michalka as Tracy

Danneel Ackles as Irene

Frances Fisher as Rebecca's Mom

Tomas Arana as Rebecca's Dad

Billy Zane as Professor Roberts

Nina Dobrev as Maria

Matt Lanter as Jason

Kat Graham as Kim

Johannes Raassina as Band Member

Cameron Fisher Brousseau as Band Member

Evan Michael Brown as Band Member

Alex Meraz as Frat Boy

Jerrika Hinton as Girl Student

Jennifer Cadena as Dorm R.A.

Adam Saunders as Handsome Guy

Cory Tucker as Club Bartender

Will McFadden as Club Guy

Munda Razooki as Club Guy

Ryan Doom as Rick

Carrie Finklea as Bookstore Girl

Andrej Nagy as Older Designer

Ashleigh Falls as Make-Up Girl

Jacqueline Mazarella as Woman Professor

Nathan Parsons as Coffee Shop Cashier

Elena Franklin as Maria's Girlfriend

Lauren Storm as Maria's Girlfriend

Stacy Barnhisel as Librarian

Cherilyn Wilson as Frat Party Girl

A.J. Hunt as Tattoo Artist

G.O. Parsons as Mocha Kid

Brian David Miller as Frat Bouncer

Jake Perry as Slacker Co-Worker

Cayla Korven Cauble as Tracy's Friend

Lauren Alfano as Samantha Tangent (uncredited)