Fredrick Fitzell

Dylan O'Brien

Mrs. Fitzell

Liisa Repo-Martell

Cindy Williams

Maika Monroe

Karen

Hannah Gross

Sebastian

Emory Cohen

Dr. Phillips

Donald Burda

Andre

Keir Gilchrist

Fred at 6

Myles Isen

Dancer

Sima Fisher

Evelyn

Amanda Brugel

Scarred Man

Connor Smith

Twenty Something Man

Josh Cruddas

Tattooed Woman

Maika Harper

Mr. MacDonald

A.C. Peterson

Pierced Man

Aaron Poole

Horned Man

Ian Matthews

Female Cop

Leslie Adlam

12 Year Old Boy

Andrew Latter

Mrs. Shouldice

Jill Frappier

Male Teacher

Conrad Bergschneider

Huge Bouncer

Constantine Meglis

Dancer

Tracy Baker

Violet

Jackie English

Mysterious Party Goer

Prince Amponsah

Overdosed Teen

Elizabeth Osler

Scarred Man (voice)

Landon Norris

Baby Fred

Parker Antal

Baby Fred

Emmet Antal

Mike (uncredited)

Hershel Blatt