Jason Schwartzman

Character: Jesper (voice)

J.K. Simmons

Character: Klaus (voice)

Rashida Jones

Character: Alva (voice)

Joan Cusack

Character: Mrs. Krum (voice)

Norm Macdonald

Character: Mogens (voice)

Will Sasso

Character: Mr. Ellingboe (voice)

Sergio Pablos

Character: Pumpkin / Olaf (voice)

Mila Brener

Character: Ellingboe Girl 3 (voice)

Neda Margrethe Labba

Character: Margu (voice)

Sydney Brower

Character: Ellingboe Girl (voice)

Teddy Blum

Character: Small Ellingboe Boy (voice)

Julian Zane

Character: Krum Boy (voice)

Emma Shannon

Character: Creepy girl 1 (voice)

Kendall Joy Hall

Character: Annelise (voice)

Sky Alexis

Character: Ellingboe Girl 2 (voice)

Tucker Meek

Character: Ellingboe Boy / Krum Boy (voice)

Amanda Philipson

Character: Ellingboe Councilwoman (voice)

Finn Carr

Character: Ellingboe Boy 1 (voice)

Lucian Perez

Character: Krum Boy / Creepy Boy 2 (voice)

Emma Yarovinsky

Character: Little Krum Girl (voice)

Jaeden Bettencourt

Character: Krum Boy / Jesper Son (voice)

Hailey Hermida

Character: Krum Girl 1 (voice)

Evan Agos

Character: Ellingboe Boy (voice)

Leo Miller

Character: Ellinboe Boy 5 (voice)

Bailey Rae Fenderson

Character: Creepy Girl 2 (voice)

Ayden Soria

Character: Creepy Boy 1 (voice)

Reiulf Aleksandersen

Character: Adult Saami (voice)

Matthew McCann

Character: Additional Kids Voices (voice)

Hudson West

Character: Additional Kids Voices (voice)

Joaquin Obradors

Character: Boy (voice)