Ross LynchJeffrey Dahmer

Alex WolffJohn 'Derf' Backderf

Anne HecheJoyce Dahmer

Dallas RobertsLionel Dahmer

Liam KoethDave Dahmer

Nancy TelzerowCarol Backderf

Tommy NelsonNeil

Harrison HolzerMike

Brigid NaughtonMelody

Cameron McKendryMoose

Katie StottlemirePenny

Brady M.K. DunnBossy

Jake IngrassiaGooch

Michael Ryan BoehmShorty

Ben ZgoreckiBully Jock

Dontez JamesCharlie Smith

Miles RobbinsLloyd Figg

Gabriela NovogratzLisa Watkins

Jack DeVillersOliver Zlatka

Dave SorboroSteven Hicks

Joey PrinesSnarky Slacker

Kris SmithMs Bowles

Adam KroloffMr Burlman

Christopher MeleMr Fedele

Joey VeeMr Hicks

Tom LeperaMr Lapolla

Vincent KartheiserDr Matthews

Maryanne NagelMrs Woodard

Sydney MeyerBridget

Lauren RhodesAide

Tom LuceVice President Walter Mondale

Carmen GangaleGrocery Store Manager

Shane Patrick O'NeillRestaurant Manager

Joe FishelMarket Shopper

Andrew GorellEnglish Teacher

Susan BennettMusical Director

Nicholas HulstineProm Photographer

Zachary Davis BrownFreshman Boy

Lily KozubFreshman Girl

Clayton Frank

Lou Consolo

Marc MeyersDirector & Screenplay

Derf BackderfComic Book

Adam GoldwormProducer

Jody GirgentiProducer

Michael MerlobProducer

Giorgio AngeliniExecutive Producer

Michael NovogratzExecutive Producer

Milan ChakrabortyProducer