John Cho

Character: Harold Lee

Kal Penn

Character: Kumar Patel

Paula Garcés

Character: Maria

Neil Patrick Harris

Character: Neil Patrick Harris

David Krumholtz

Character: Seth Goldstein

Eddie Kaye Thomas

Character: Rosenberg

Christopher Meloni

Character: Freakshow

Malin Åkerman

Character: Liane

Ryan Reynolds

Character: Male Nurse

Fred Willard

Character: Dr. Willoughby

Kate Kelton

Character: Christy

Brooke D'Orsay

Character: Clarissa

Siu Ta

Character: Cindy Kim

Steve Braun

Character: Cole

Bobby Lee

Character: Kenneth Park

Dov Tiefenbach

Character: Hippie Student

Anthony Anderson

Character: Burger Shack Employee

Gary Anthony Williams

Character: Tarik

Rob Tinkler

Character: J.D.

Ethan Embry

Character: Billy Carver

Boyd Banks

Character: E.R. Patient

Dan Bochart

Character: Extreme Sports Punk #1

Mike Sheer

Character: 'I'm So High' Kid

Christopher Thompson

Character: 'Don't You Wanna Be Cool' Kid

Angelo Tsarouchas

Character: Mean Tollbooth Guy

Albert Howell

Character: Security Guard

Errol Sitahal

Character: Dr. Patel

Shaun Majumder

Character: Saikat Patel

Rick Sood

Character: Indian Cashier

Sandy Jobin-Bevans

Character: Officer Palumbo

Brad Borbridge

Character: Officer Martone

Frank Spadone

Character: Officer Reilly

Jordan Prentice

Character: Giant Bag of Weed

Gary Archibald

Character: Nathaniel Brooks

John Boylan

Character: Officer Brucks

Dan Warry-Smith

Character: White Castle Teenager

Thea Andrews

Character: Female Anchor

Jamie Kennedy

Character: Creepy Guy (uncredited)

Jon Hurwitz

Character: Tony (uncredited)

Hayden Schlossberg

Character: Hayden (uncredited)

Frank Meschkuleit

Character: Raccoon (puppeteer)