Jack Black

R.L. Stine

Dylan Minnette

Zach Cooper

Odeya Rush

Hannah Fairchild

Amy Ryan

Gale Cooper

Ryan Lee

Champ

Jillian Bell

Lorraine Conyers

Halston Sage

Taylor

Ken Marino

Coach Carr

Timothy Simons

Officer Stevens

Amanda Lund

Officer Brooks

Steven Krueger

Davidson

Keith Arthur Bolden

Principal Garrison

Karan Soni

Mr. Rooney

R.L. Stine

Hallway Player

Caleb Emery

Dumb Jock

Gabriela Hernandez

Screaming Girl

Nate Andrade

Monster

Sheldon Brown

Monster

Melissa Brewer

Monster

Marshall Choka

Monster

Melissa Cowan

Monster

John Deifer

Monster

Everett Dixon

Monster

Brian Gabriel

Monster

Kevin Galbraith

Monster

Maryann Gorka

Monster

Clare Halstead

Monster

Devin Hampton

Monster

Rory Healy

Monster

Drew Lamkins

Monster

Vivian Kyle

Monster

Charlie Leach

Monster

Katie Lumpkin

Monster

Larry Mainland

Monster

Lucky Mangione

Monster

Justin Natic

Monster

Josh Phillips

Monster

Mickie Pollock

Monster

Steve Quinn

Monster

Ashleigh Jo Sizemore

Monster

Jeff Tenney

Monster

Jennifer Trudrung

Monster

Ashton Lee Woolen

Monster

Coleman Youmans

Monster

E. Roger Mitchell

Mayor (uncredited)

Jason Davis

Cyclist (uncredited)

Ella Wahlestedt

Anna (uncredited)

Amber Thrower

Goth Woman (uncredited)