Gaten Matarazzo
Michael Dipnicky
Christopher Mintz-Plasse
Mr. Calvin
Armani Jackson
Travis Biggins
Michael P. Northey
Marvin Rose
Danny Wattley
Coach Biggins
Arghavan Jenati
Lily / Miss Chugani
Matreya Monro
Ms. Dipnicky
Samuel Braun
Young Man in Bar
Brendan McRae
Potential Date #1
Connor Wong
Potential Date #2
Christian Lagasse
Potential Date #3 - Mike
Daniel Desveaux
Dipnicky's Dad
Stewart Prince
Howie Kaplan
Henry C. King
Young Coach Biggins
June B. Wilde
Bowling Alley Server
Sophia Bucior
Young Ms. Felson
Julien Naud
Theater Student #1
Darian Mark
Theater Student #2
Beta Chan
Theater Student #3
Maia Cervellin
Theater Student #4
Valin Shinyei
Theater Student #5
Malia McMullen
Play Dancer #3
Jenna Homan
Play Dancer #4
Marlee Grace Becker
Play Dancer #5
Vanessa Prasad
Doreen Leddy (uncredited)