Monster

Charlize Theron

Aileen Wuornos

Christina Ricci

Selby Wall

Bruce Dern

Thomas

Lee Tergesen

Vincent Corey

Annie Corley

Donna

Pruitt Taylor Vince

Gene / Stuttering "John"

Marco St. John

Evan / Undercover "John"

Marc Macaulay

Will / Daddy "John"

Scott Wilson

Horton / Last "John"

Rus Blackwell

Cop

Tim Ware

Chuck

Stephan Jones

Lawyer