Ross Lynch
Jeffrey Dahmer
Alex Wolff
John 'Derf' Backderf
Anne Heche
Joyce Dahmer
Dallas Roberts
Lionel Dahmer
Liam Koeth
Dave Dahmer
Nancy Telzerow
Carol Backderf
Tommy Nelson
Neil
Harrison Holzer
Mike
Brigid Naughton
Melody
Cameron McKendry
Moose
Katie Stottlemire
Penny
Brady M.K. Dunn
Bossy
Jake Ingrassia
Gooch
Michael Ryan Boehm
Shorty
Ben Zgorecki
Bully Jock
Dontez James
Charlie Smith
Miles Robbins
Lloyd Figg
Gabriela Novogratz
Lisa Watkins
Jack DeVillers
Oliver Zlatka
Dave Sorboro
Steven Hicks
Joey Prines
Snarky Slacker
Kris Smith
Ms Bowles
Adam Kroloff
Mr Burlman
Christopher Mele
Mr Fedele
Joey Vee
Mr Hicks
Tom Lepera
Mr Lapolla
Vincent Kartheiser
Dr Matthews
Maryanne Nagel
Mrs Woodard
Sydney Meyer
Bridget
Lauren Rhodes
Aide
Tom Luce
Vice President Walter Mondale
Carmen Gangale
Grocery Store Manager
Shane Patrick O'Neill
Restaurant Manager
Joe Fishel
Market Shopper
Andrew Gorell
English Teacher
Susan Bennett
Musical Director
Nicholas Hulstine
Prom Photographer
Zachary Davis Brown
Freshman Boy
Lily Kozub
Freshman Girl
Clayton Frank
Bus Student 1 (uncredited)