Likeable 6th grader Liam writes to Santa asking him to prove that he's real. But Liam is dyslexic and accidentally sends his letter to Satan instead, who shows up at Liam's house, excited to have his first fanboy letter and wanting a little of Liam's soul.

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

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