James Franco

as James Franco

Jonah Hill

as Jonah Hill

Seth Rogen

as Seth Rogen

Jay Baruchel

as Jay Baruchel

Danny McBride

as Danny McBride

Craig Robinson

as Craig Robinson

Michael Cera

as Michael Cera

Emma Watson

as Emma Watson

Mindy Kaling

as Mindy Kaling

David Krumholtz

as David Krumholtz

Christopher Mintz-Plasse

as Christopher Mintz-Plasse

Rihanna

as Rihanna

Martin Starr

as Martin Starr

Paul Rudd

as Paul Rudd

Channing Tatum

as Channing Tatum

Kevin Hart

as Kevin Hart

Aziz Ansari

as Aziz Ansari

Samantha Ressler

as Karen (Franco's Asst.)

Douglas M. Griffin

as Father in Store

Lo Graham

as Daughter in Store

Carol Sutton

as Cashier

Yohance Myles

as Cell Phone Guy

Richard Holden

as Priest

Brian Huskey

as Headless Man

Randy Rousseau

as News Reporter

Travers Mackel

as News Reporter

Amber Carew

as Cera Girl #1

Dallas West

as Cera Girl #2

David Jensen

as Cannibal #1

Jack Flynn

as Cannibal #2

Carey Jones

as Rape Demon

Ricky Mabe

as Santa Cannibal

Jason Cox

as Paparazzi

Nick Carter

as Backstreet Boys

Howie Dorough

as Backstreet Boys

Brian Littrell

as Backstreet Boys

AJ McLean

as Backstreet Boys

Kevin Richardson

as Backstreet Boys

Will Addison

as Party Hipster (uncredited)

Edward J. Clare

as Capt. Angelo (uncredited)

Dwight V Coleman

as Hick (uncredited)

John Darko

as Partygoer (uncredited)

Ashleigh Dejon

as Partygoer (uncredited)

Michelle DeVito

as Partygoer (uncredited)

Z. Dieterich

as Melrose Driver (uncredited)

Tammy Dugen

as Greek Woman (uncredited)

Evan Goldberg

as Evan Goldberg (uncredited)

Damian Gomez

as Backstreet Boys Backup Dancer (uncredited)

Steffie Grote

as LA Hipster / Driver (uncredited)

Devin Hennessy

as Disco Dude (uncredited)

Ashley Lambert

as Party Girl (voice)

Chi Muoi Lo

as Jang (uncredited)

Brittany Perry-Russell

as Heaven's Angel (uncredited)

Erin Rementer

as Flight Attendant (uncredited)

Met Salih

as Partygoer (uncredited)

Jordan Sudduth

as Partygoer (uncredited)

Brandon Trost

as Cannibal (uncredited)

Jason Trost

as JTRO (uncredited)

Joseph Uzzell

as Airport Passenger (uncredited)

Syd Wilder

as Angel (uncredited)

Jason Segel

as Jason Segel (uncredited)