Monster
Charlize TheronAileen Wuornos
Christina RicciSelby Wall
Bruce DernThomas
Lee TergesenVincent Corey
Annie CorleyDonna
Pruitt Taylor VinceGene / Stuttering "John"
Marco St. JohnEvan / Undercover "John"
Marc MacaulayWill / Daddy "John"
Scott WilsonHorton / Last "John"
Rus BlackwellCop
Tim WareChuck
Stephan JonesLawyer
Brett RiceCharles
Kaitlin RileyTeenage Aileen- CCree Ivey7-Year-Old Aileen
- CCatherine ManganJusty
Magdalena ManvilleBar Lap Girl- TT. Robert PigottBartender
- RRomonda ShaverEmployment Agent
Glenn R. WilderRestaurant Manager- EElaine StebbinsWife at Accident
Kane HodderUndercover Cop
Christian StokesUndercover Cop- LLyllian BarcaskiBar Girl
- NNonalee DavisBar Girl
- BBubba BakerCubby
- AAlHimself
- CCannonballHimself
- CChad VaccarinoTrevor
- GGene R. StephensonJudge
- JJesse SternSkate Rink Attendant
- BBilly BoylanPolice Chief
Jim R. ColemanNewscaster- CChandra LeighCute Teenage Attendant
- LLori McDonaldAttendant
- AAdam BrownAttendant
- EEd DonovanState Prison Guard (uncredited)