J.K. Simmons Klaus (voice)
James Baxter Animation
Rashida Jones Alva (voice)
Jason Schwartzman Jesper (voice)
Joan Cusack Mrs. Krum (voice)
Norm Macdonald Mogens (voice)
Will Sasso Mr. Ellingboe (voice)
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
Tony Fucile Animation
Evan Agos Ellingboe Boy (voice)
John Pomeroy Animation
Carlos Sotolongo Dialogue Editor
Sergio Pablos Pumpkin / Olaf (voice), Original Story, Screenplay, Director, Producer
Matthew Jon Beck Casting
Mila Brener Ellingboe Girl 3 (voice)
Maxime Delalande Animation
Tucker Meek Ellingboe Boy / Krum Boy (voice)
Ole Christian Løken Animation
Zach Lewis Screenplay
Toby Schwarz Animation
Emma Shannon Creepy girl 1 (voice)
Sydney Brower Ellingboe Girl (voice)
Fernando Moro Animation
Slaven Reese Lead Animator
Jim Mahoney Screenplay
Mercedes Gamero Producer
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)
Szymon Biernacki Production Design
Jinko Gotoh Executive Producer
Paul Williams Animation
Caroline Piochon Animation
Yoshimichi Tamura Lead Animator
Amanda Philipson Ellingboe Councilwoman (voice)
Warren Franklin Executive Producer
Borja Montoro Animation
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
Bailey Rae Fenderson Creepy Girl 2 (voice)
Javier Ferrer Animation
Alfonso G. Aguilar Original Music Composer
Lucian Perez Krum Boy / Creepy Boy 2 (voice)
Eamonn Butler Executive Producer
Carlos Luzzi Animation
Jorge A. Capote Animation
Pablo García Revert Editor
Clément Girard Animation
Victor Ens Lead Animator
Charles Bonifacio Lead Animator
Sandro Cleuzo Animation
Daniel O'Sullivan Animation
Marc Valls Pla Animation
Torsten Schrank Character Designer