Gerard Butler as Kable

Amber Valletta as Angie

Michael C. Hall as Ken Castle

Kyra Sedgwick as Gina Parker Smith

Logan Lerman as Simon

Alison Lohman as Trace

Terry Crews as Hackman

Ramsey Moore as Gorge

Ludacris as Humanz Brother

Johnny Whitworth as Scotch

Dylan Kenin as Train Guard

James Roday Rodriguez as News Co-Host #1

Milo Ventimiglia as Rick Rape

Aaron Yoo as Humanz Dude

John Leguizamo as Freek

Zoë Bell as Sandra

Ashley Rickards as 2Katchapredator

Brighid Fleming as Delia

Nikita Ramsey as Kumdumpsta #1

Jade Ramsey as Kumdumpsta #2

Mimi Michaels as Stikkimuffin

Sadie Alexandru as Society Victim

David Scott Rubin as Lab Tech

Michael Weston as Producer

Noel Gugliemi as Upgrade Guard

Keith David as Agent Keith

Maggie Lawson as Female News Host #1

Antoinette Antonio as Female News Host #2

Donnie Smith as News Co-Host #2

Sam Witwer as Caseworker

Lloyd Kaufman as Genericon

Jonathan Chase as Geek Leader

Dan Callahan as Backup Geek

Keith Jardine as Mean Slayer

Joseph D. Reitman as Board Op

John de Lancie as Chief Of Staff

Jarvis W. George as Brown Soldier #1

Jai Stefan as Brown Soldier #2

Eidan Hanzei as Razorblade

Med Abrous as Pig Face Ron

Efren Ramirez as DJ

Stephanie Mace as Geek Girl

Hayley Derryberry as Raver

Yvette Fazio-Delaney as Society Victim

Richard Machowicz as Blue Soldier #1

Ken Smith as Lifer

Rebekah Tarin as Dale

Kate Mulligan as Sorority Chick

Ariana Scott as Sissypuss Shelley

Cynthia Robertson as Porn Girl

Adam Loeb as Ben Richard

Fred Loeb as Society Concierge