Jack Black
Satan
Robert Timothy Smith
Liam Turner
Keegan-Michael Key
Dr. Finkleman
Brianne Howey
Molly Turner
Hayes MacArthur
Bill Turner
P.J. Byrne
Mr. Charles
Jaden Carson Baker
Gibby
Kai Cech
Emma
Post Malone
Post Malone
Gavin Munn
Aidan
Cate Freedman
Crossing Guard
Ben Stiller
Lucifer (uncredited)
Kyle Gass
Science Teacher
L
Lee Reyes
Lee
B
Bash Hagelin
Joey
B
Bryson Dean Haney
Grayson
L
Lindsay Rootare
Technician
L
Luke Chiappetta
Jock
G
Greg Clarkson
Male Newscaster
M
Maiya Moran
Female Newscaster
Leo Easton Kelly
Spencer
T
Tierre Turner
Blitzen (voice)
C
Carole Kaboya
Little Kid’s Mom
Travon McEntyre
Male Nurse
I
Izzy Herbert
Flirty Girl
Selah Kimbro Jones
Attractive Girl
Abe Farrelly
Tattoo Tony