Gaten Matarazzo

Jack

Sean Giambrone

Montgomery

Lulu Wilson

Lizzy

Jack Martin

Blake

Peyton Elizabeth Lee

Ashley

Marcus Scribner

Logan

Caleb Hearon

Sidney

Chris Schmidt Jr.

Stoner Guy

Sarah Sherman

Frankie

Miguel-Andres Garcia

Juan

Justin Cooley

Byron

Luke Burke

Skinny Kid in Elevator

Hyde Healy

Jake

Abigail Wood

10 Year Old Lizzy

Mia Cavallero

Young Popular Girl

Shiv Pai

RA Henchman

Ryan Micho

Ryan

Lydia Hines

Lydia

Tommy Armstrong

Tommy

Kevin Matthew Reyes

Colin

Aidan Micho

Aidan

Ava Laborde

Tiffany

James Collins

Football Coach

Jordan Carlos

Delivery Guy

Pete Flack

Pete

Lucas Zelnick

Ex-Football Bro

Nick Kocher

Nick

Brian McElhaney

Brian

Peter Gerety

Grandpa

Christopher Martinez

Matthew

Chelsea Matkins

Sweet Student Union Girl

Adam Herschman

Older Jack

Aaron Schroeder

Cabaret Puppet (voice)

Bobby Moynihan

Snackatron 3000 (voice)

Adam Ray

Pizza Place Guy (voice)

Daniel Radcliffe

Lysander (voice)

Errol Fern

Student (uncredited)