Jason Schwartzman
Jesper (voice)

J.K. Simmons
Klaus (voice)

Rashida Jones
Alva (voice)

Joan Cusack
Mrs. Krum (voice)

Norm Macdonald
Mogens (voice)

Will Sasso
Mr. Ellingboe (voice)

Sergio Pablos
Pumpkin / Olaf (voice)

Mila Brener
Ellingboe Girl 3 (voice)

Sydney Brower
Ellingboe Girl (voice)

Julian Zane
Krum Boy (voice)

Emma Shannon
Creepy girl 1 (voice)

Kendall Joy Hall
Annelise (voice)

Sky Alexis
Ellingboe Girl 2 (voice)

Tucker Meek
Ellingboe Boy / Krum Boy (voice)

Amanda Philipson
Ellingboe Councilwoman (voice)

Finn Carr
Ellingboe Boy 1 (voice)

Lucian Perez
Krum Boy / Creepy Boy 2 (voice)

Emma Yarovinsky
Little Krum Girl (voice)

Jaeden Bettencourt
Krum Boy / Jesper Son (voice)

Evan Agos
Ellingboe Boy (voice)

Matthew McCann
Additional Kids Voices (voice)

Hudson West
Additional Kids Voices (voice)

Joaquin Obradors
Boy (voice)