Katie Chang

Character: Rebecca

Emma Watson

Character: Nicki

Taissa Farmiga

Character: Sam

Claire Julien

Character: Chloe

Israel Broussard

Character: Marc

Leslie Mann

Character: Laurie

Georgia Rock

Character: Emily

Carlos Miranda

Character: Rob

Gavin Rossdale

Character: Ricky

Stacy Edwards

Character: Marc's Mom

G. Mac Brown

Character: Henry

Marc Coppola

Character: Mr. Hall - Marc's Dad

Janet Song

Character: Rebecca's Mom

Annie Fitzgerald

Character: Kate from Vanity Fair

Lorenzo Hunt

Character: Police Officer #1 (Nicki's)

Timothy Starks

Character: Police Officer #1 (Marc's)

Rich Ceraulo Ko

Character: Police Officer #2 (Nicki's)

Joe Nieves

Character: Police Officer (Rebecca's)

Nelson Rockford

Character: Las Vegas Plainclothes Officer

Doug DeBeech

Character: Adam

Erin Daniels

Character: Shannon

Patricia Lentz

Character: Judge

Michelle Alegria

Character: Female TV Reporter #1

Stacey Turner

Character: Female TV Reporter #2

Brian Gattas

Character: Dogwalker

Logan Miller

Character: Kid at Party

Marcia Ann Burrs

Character: Grandma

Michael Yo

Character: Male E-Interviewer

Halston Sage

Character: School Girl

Marshall Bell

Character: L.A. Detective #1

Brenda Koo

Character: Sarah

Maika Monroe

Character: Beach Girl

Isabel Lasker

Character: Drunk Girl

Adea Lennox

Character: Party Girl

Keenan Henson

Character: Male TMZ Reporter

Rachelle Carson-Begley

Character: Chloe's Mom

Peter Bigler

Character: Chloe's Dad

Chad Brannon

Character: Water Delivery Guy

Zoë Bleu Sidel

Character: School Girl's Friend

Cari Champion

Character: Female TV Reporter #3

Nina Siemaszko

Character: Vegas Detective (Female)

Bailey Coppola

Character: Wasted Boy

Yolanda Lloyd Delgado

Character: Rob's Mom

Linc Hand

Character: Police Officer Arresting Rob

Brett Goodkin

Character: L.A. Detective #2

Paris Hilton

Character: Paris Hilton

Kevin Spencer

Character: Bedroom Police Officer #1

Sean Phillips

Character: Bedroom Police Officer #2

Bobby Ashhurst

Character: Police Officer #3

Karl Risinger

Character: Police Officer #2 (Marc's)

Dale Champion

Character: School Teacher

Kirsten Dunst

Character: Kirsten Dunst (uncredited)