Megan Fox
Jennifer
Acting
Amanda Seyfried
Needy
Acting
Johnny Simmons
Chip
Acting
Adam Brody
Nikolai
Acting
Sal Cortez
Chas
Acting
Ryan Levine
Mick
Acting
Juan Riedinger
Dirk
Acting
Colin Askey
Keyboardist
Acting
Chris Pratt
Roman Duda
Acting
Juno Rinaldi
Officer Warzak
Acting
Kyle Gallner
Colin Gray
Acting
Josh Emerson
Jonas Kozelle
Acting
J.K. Simmons
Mr. Wroblewski
Acting
Amy Sedaris
Needy's Mom
Acting
Cynthia Stevenson
Chip's Mom
Acting
Nicole Leduc
Camille
Acting
Aman Johal
Ahmet from India
Acting
Dan Joffre
Raymundo
Acting
Candus Churchill
Nutritionist
Acting
Carrie Genzel
Jennifer's Mom
Acting
Emma Gallello
Little Jennifer
Acting
Megan Charpentier
Little Needy
Acting
Jeremy Schuetze
Craig
Acting
Valerie Tian
Chastity
Acting
Emily Tennant
Gossiping Girl
Acting
Karissa Tynes
Other Girl
Acting
Eve Harlow
Goth Girl
Acting
Michael Brock
Goth Boy
Acting
Genevieve Buechner
Goth Girl #2
Acting
Adrian Hough
Colin's Dad
Acting
Gabrielle Rose
Colin's Mom
Acting
Michael Bean
Priest
Acting
Bill Fagerbakke
Jonas' Dad
Acting
Marilyn Norry
Jonas' Mom
Acting
Cut Chemist
DJ at Dance
Acting
Zoe LaLiberté
Candlelight Vigil Singer
Acting
Chelsey Smith
Candlelight Vigil Singer
Acting
Whitney Chow
Candlelight Vigil Singer
Acting
Michael Orstad
Candlelight Vigil Singer
Acting
Ronnie Robinson
Orderly
Acting
Ed Anders
Orderly
Crew
Roxanne Wong
Patient #1
Acting
Diane Dutra
Patient #2
Acting
Maya Toews
The Creepy Hand
Production
Diablo Cody
Melody Lane Drinking Woman (uncredited)
Writing
Lance Henriksen
Passing Motorist (uncredited)
Acting