Reparto
Madison Iseman
Sarah Quinn
Jeremy Ray Taylor
Sonny Quinn
Caleel Harris
Sam Carter
Wendi McLendon-Covey
Kathy Quinn
Ken Jeong
Mr. Chu
Chris Parnell
Walter
Bryce Cass
Tyler
Peyton Wich
Tommy Madigan
Shari Headley
Mrs. Carter
Christian Finlayson
Cooper
Matthew J. Vasquez
Derek
Courtney Lauren Cummings
Jess
Jessi Goei
Maya
Drew Scheid
Tyler's Crew
Sydney Bullock
Vanessa
Jason Looney
Terrified Parent Monster-Mr. Rennie
Kendrick Cross
Sam's Father
Déjá Dee
Mrs. Hoover
Brick Jackson
Paramedic- TJ
R.L. Stine
Science Award Presenter-Principal Harrison
Mick Wingert
Slappy (voice)
Jack Black
R.L. Stine (uncredited)
Jasmine Bolton
Middle School Kid (uncredited)
Darin De Paul
Terry / Angry Pumpkin (voice) (uncredited)
Suehyla El-Attar Young
Teacher in Hole (uncredited)
Catherine Jerald
Monster (uncredited)
Sawyer D. Jones
Trick-or-Treater (uncredited)
Gracie Marcellus
Middle Schooler (uncredited)
Shaun McMillan
Middle School Principal (uncredited)
Ivy O'Brien
(uncredited)
Ben Bladon
Royal Mummy
