Jack Black

Character: Satan

Robert Timothy Smith

Character: Liam Turner

Keegan-Michael Key

Character: Dr. Finkleman

Brianne Howey

Character: Molly Turner

Hayes MacArthur

Character: Bill Turner

P.J. Byrne

Character: Mr. Charles

Jaden Carson Baker

Character: Gibby

Kai Cech

Character: Emma

Post Malone

Character: Post Malone

Gavin Munn

Character: Aidan

Cate Freedman

Character: Crossing Guard

Ben Stiller

Character: Lucifer (uncredited)

Kyle Gass

Character: Science Teacher

Lee Reyes

Character: Lee

Bash Hagelin

Character: Joey

Bryson Dean Haney

Character: Grayson

Lindsay Rootare

Character: Technician

Luke Chiappetta

Character: Jock

Greg Clarkson

Character: Male Newscaster

Maiya Moran

Character: Female Newscaster

Leo Easton Kelly

Character: Spencer

Tierre Turner

Character: Blitzen (voice)

Carole Kaboya

Character: Little Kid’s Mom

Travon McEntyre

Character: Male Nurse

Izzy Herbert

Character: Flirty Girl

Selah Kimbro Jones

Character: Attractive Girl

Abe Farrelly

Character: Tattoo Tony