Josh Zuckerman

as Ian Lafferty

Amanda Crew

as Felicia

Clark Duke

as Lance

James Marsden

as Rex Lafferty

Seth Green

as Ezekiel

Alice Greczyn

as Mary

Katrina Bowden

as Ms. Tasty

Charlie McDermott

as Andy

Mark L. Young

as Randy

Cole Petersen

as Dylan Lafferty

Dave Sheridan

as Bobby Jo

Michael Cudlitz

as Rick

Allison Weissman

as Becca

Andrea Anders

as Brandy

Kim Ostrenko

as Mrs. Lafferty - Ian's Stepmom

Brett Rice

as Mr. Lafferty - Ian's Dad

David Koechner

as Hitchhiker

Caley Hayes

as Sandy

Michele Simms

as Drunk Amish Girl

Shay Roman

as Pregnant Kristy

Bella Salinas

as Fundraising Girl

John Ross Bowie

as Dr. Clark Teddescoe

Keith Hudson

as Angry Cop

Marianne Muellerleile

as Grandma Prisoner

Jessica Just

as Lindsay

Brian Posehn

as Carney

Scott Klace

as Lance's Dad

Allen Zwolle

as Men's Room Predator

Cleo King

as Abstinence Host

Josh Duarte

as Brandy's Dad

Marcia Koch

as Brandy's Mom

Ken Clement

as Señor Donut Manager

Susie Abromeit

as Cousin Tiffany

David Andrew Nash

as Jail Cop

Giovanni Rodriguez

as Thug Prisoner

Alan Lilly

as Prisoner in Sports Jacket

Matthew Ramsey

as Mall Prankster

Sasha Ramos

as Kimberly

Sandra Ives

as Seamstress

Olivia Nedza

as Little Girl at Mall

Sam E. Goldberg

as "Harsh" Guy

Rebecca Finer

as Girl Entering Party

Drake Schirmer

as Little Boy at Trailer Park

Massiel Perdomo

as Undressed Abstinence Dancer

Brad Wilhite

as Store Cashier

Dwayne Alexander Smith

as Dwayne

Santara Sidersky

as Angry Female Prisoner

Natalia Reagan

as Pregnant Woman Prisoner

Kiki Harris

as Female Cop

George Steward

as Creepy Guy

Chris Charles Herbert

as Jogger

Jimmy Baron

as Church Dad

Kathryn Shasha

as Church Mom

Darryll C. Scott

as Angry Cop's Partner (as Darryll Scott)

Shelly Frasier

as Dental Receptionist

Jeremy McGuire

as Rex's Boyfriend

Pete Wentz

as Pete Wentz (Fall Out Boy)

Joe Trohman

as Joe Trohman (Fall Out Boy)

Patrick Stump

as Patrick Stump (Fall Out Boy)

Andy Hurley

as Andy Hurley (Fall Out Boy)

Kyle Gass

as Trucker