Alex Pettyfer

John Smith / Number Four

Sabrina de Matteo

Physics Teacher

Cooper Thornton

Sarah's Dad

Judith Hoag

Sarah's Mom

Jack Walz

Sarah's Brother

Bill Laing

Demented Farmer

Beau Mirchoff

Drew

Cody Johns

Kern

Damien Walters

MOG Warrior

Jon Braver

MOG Warrior

Matt Leonard

MOG Warrior

Nash Edgerton

MOG Warrior

Tim Sitarz

MOG Warrior

Tucker Albrizzi

Tuck (uncredited)

Megan Follows

Supermarket Cashier (uncredited)

L. Derek Leonidoff

Mr. Berhman

Charles Carroll

Sam's Stepdad

Dianna Agron

Sarah Hart

Teresa Palmer

Number Six / Maren Elizabeth

Timothy Olyphant

Henri Smith