Narrator

Neil Ross

Self

Scarlett Johansson

Self - Aileen's Childhood Friend

Dawn Botkins

Self

Arlene Pralle

Self - Defense Attorney

Steve Glazer

Self - Aileen's Girlfriend

Tyria Moore

Aileen Wuornos (voice)

Donna Jay Fulks

Narrator

Paul Kaup

Narrator (voice)

Justin Barrett

Himself (archival footage)

Dave Chappelle

Himself

Ken Tucker

Himself

Tanika Ray

Himself

Chuck Nice

Narrator

Dion Graham

Self - Childhood Friend

Barry Boschelli

Self - Fellow Inmate

Ray Cornell

Self - Former Gacy Employee

David Cram

Self - Police Investigator

David Hachmeister

Self - Sister

Karen Kuzma

Self - Gacy Biographer

Terry Sullivan

Self - Psychiatrist

Helen Morrison

Self

Arnold Schwarzenegger

Self

James Caan

Self

Jim Belushi

Self

Ivan Reitman

Self

Jonathan Mostow

George Butler

George Butler

George Clooney

George Clooney

Self

Claire Danes

Self

Kristanna Loken

Self

Penelope Ann Miller

Self

Ronald Shusett

Self

Robin Williams

Self

Stan Winston

Self

Maria Shriver