I Am Number Four

Alex Pettyfer

John Smith / Number Four

Dianna Agron

Sarah Hart

Teresa Palmer

Number Six / Maren Elizabeth

Timothy Olyphant

Henri Smith

Kevin Durand

Mogadorian Commander

Callan McAuliffe

Sam Goode

Jake Abel

Mark James

Garrett M. Brown

Mr. Simms

Patrick Sebes

Kevin

Emily Wickersham

Nicole

Jeff Hochendoner

Sherriff James

Greg Townley

Number 3

Reuben Langdon

Number 3's Guardian

Molly McGinnis

Receptionist

Brian Howe

Frank

Andy Owen

Bret

Sophia Anne Caruso

Girl on Street

Charles Carroll

Sam's Stepdad