Katie Chang
Rebecca

Emma Watson
Nicki

Taissa Farmiga
Sam

Claire Julien
Chloe

Israel Broussard
Marc

Leslie Mann
Laurie

Georgia Rock
Emily

Carlos Miranda
Rob

Gavin Rossdale
Ricky

Stacy Edwards
Marc's Mom

Marc Coppola
Mr. Hall - Marc's Dad

Janet Song
Rebecca's Mom

Timothy Starks
Police Officer #1 (Marc's)

Rich Ceraulo Ko
Police Officer #2 (Nicki's)

Joe Nieves
Police Officer (Rebecca's)

Erin Daniels
Shannon

Patricia Lentz
Judge

Michelle Alegria
Female TV Reporter #1

Stacey Turner
Female TV Reporter #2

Brian Gattas
Dogwalker

Logan Miller
Kid at Party

Marcia Ann Burrs
Grandma

Michael Yo
Male E-Interviewer

Halston Sage
School Girl

Marshall Bell
L.A. Detective #1

Brenda Koo
Sarah

Maika Monroe
Beach Girl

Adea Lennox
Party Girl

Keenan Henson
Male TMZ Reporter

Rachelle Carson-Begley
Chloe's Mom

Zoë Bleu Sidel
School Girl's Friend

Cari Champion
Female TV Reporter #3

Nina Siemaszko
Vegas Detective (Female)

Bailey Coppola
Wasted Boy

Linc Hand
Police Officer Arresting Rob

Paris Hilton
Paris Hilton

Kirsten Dunst
Kirsten Dunst (uncredited)

Lindsay Lohan
Self(archive footage) (uncredited)