J.K. Simmons Klaus (voice)
Rashida Jones Alva (voice)
Joan Cusack Mrs. Krum (voice)
Jason Schwartzman Jesper (voice)
Norm Macdonald Mogens (voice)
Will Sasso Mr. Ellingboe (voice)
Tony Fucile Animation
James Baxter Animation
Kendall Joy Hall Annelise (voice)
Julian Zane Krum Boy (voice)
Alan Tyler Additional Music
Sky Alexis Ellingboe Girl 2 (voice)
Matt Williames Lead Animator
Micah Dahlberg Producer, Casting
Hudson West Additional Kids Voices (voice)
Finn Carr Ellingboe Boy 1 (voice)
Jaeden Bettencourt Krum Boy / Jesper Son (voice)
Marisa Román Producer
John Pomeroy Animation
Sergio Pablos Pumpkin / Olaf (voice), Original Story, Screenplay, Director, Producer
Matthew Jon Beck Casting
Mila Brener Ellingboe Girl 3 (voice)
Tucker Meek Ellingboe Boy / Krum Boy (voice)
Emma Shannon Creepy girl 1 (voice)
Ole Christian Løken Animation
Carlos Sotolongo Dialogue Editor
Zach Lewis Screenplay
Evan Agos Ellingboe Boy (voice)
Toby Schwarz Animation
Sydney Brower Ellingboe Girl (voice)
Fernando Moro Animation
Slaven Reese Lead Animator
Jim Mahoney Screenplay
Mercedes Gamero Producer
Warren Franklin Executive Producer
Lucian Perez Krum Boy / Creepy Boy 2 (voice)
Matthew McCann Additional Kids Voices (voice)
Hailey Hermida Krum Girl 1 (voice)
Joaquin Obradors Boy (voice)
Andrew Chesworth Animation
Mikel Lejarza Producer
Neda Margrethe Labba Margu (voice)
Jinko Gotoh Executive Producer
Paul Williams Animation
Caroline Piochon Animation
Yoshimichi Tamura Lead Animator
Amanda Philipson Ellingboe Councilwoman (voice)
Alfredo Cassano Lead Animator
Pablo Navarro Animation
Leo Miller Ellinboe Boy 5 (voice)
Len Simon Animation
Emma Yarovinsky Little Krum Girl (voice)
Ayden Soria Creepy Boy 1 (voice)
Teddy Blum Small Ellingboe Boy (voice)
Mathilde Vachet Animation
Szymon Biernacki Production Design
Bailey Rae Fenderson Creepy Girl 2 (voice)
Javier Ferrer Animation
Alfonso G. Aguilar Original Music Composer
David Vandervoort Animation
Taha Neyestani Storyboard Artist
Jorge A. Capote Animation
Pablo García Revert Editor
Clément Girard Animation
Eamonn Butler Executive Producer
Daniel Fernandez-Casas Character Designer
Victor Ens Lead Animator
Charles Bonifacio Lead Animator
Sandro Cleuzo Animation
Daniel O'Sullivan Animation
Marc Valls Pla Animation
Torsten Schrank Character Designer