When Jesper distinguishes himself as the Postal Academy’s worst student, he is sent to Smeerensburg, a small village located on an icy island above the Arctic Circle, where grumpy inhabitants barely exchange words, let alone letters. Jesper is about to give up and abandon his duty as a postman when he meets local teacher Alva and Klaus, a mysterious carpenter who lives alone in a cabin full of handmade toys.

• Jesper (voice): Jason Schwartzman
• Klaus (voice): J.K. Simmons
• Alva (voice): Rashida Jones
• Mrs. Krum (voice): Joan Cusack
• Mogens (voice): Norm Macdonald
• Mr. Ellingboe (voice): Will Sasso
• Pumpkin / Olaf (voice): Sergio Pablos
• Ellingboe Girl 3 (voice): Mila Brener
• Margu (voice): Neda Margrethe Labba
• Ellingboe Girl (voice): Sydney Brower
• Small Ellingboe Boy (voice): Teddy Blum
• Krum Boy (voice): Julian Zane
• Creepy girl 1 (voice): Emma Shannon
• Annelise (voice): Kendall Joy Hall
• Ellingboe Girl 2 (voice): Sky Alexis
• Ellingboe Boy / Krum Boy (voice): Tucker Meek
• Ellingboe Councilwoman (voice): Amanda Philipson
• Ellingboe Boy 1 (voice): Finn Carr
• Krum Boy / Creepy Boy 2 (voice): Lucian Perez
• Little Krum Girl (voice): Emma Yarovinsky
• Krum Boy / Jesper Son (voice): Jaeden Bettencourt
• Krum Girl 1 (voice): Hailey Hermida
• Ellingboe Boy (voice): Evan Agos
• Ellinboe Boy 5 (voice): Leo Miller
• Creepy Girl 2 (voice): Bailey Rae Fenderson
• Creepy Boy 1 (voice): Ayden Soria
• Adult Saami (voice): Reiulf Aleksandersen
• Additional Kids Voices (voice): Matthew McCann
• Additional Kids Voices (voice): Hudson West

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• Casting: Matthew Jon Beck
• Executive Producer: Jinko Gotoh
• Original Story: Sergio Pablos
• Lead Animator: Victor Ens
• Producer: Gustavo Ferrada
• Producer: Mercedes Gamero
• Producer: Marisa Román
• Producer: Mikel Lejarza
• Animation: Yoshimichi Tamura
• Head of Story: Edgar Martins
• Executive Producer: Eamonn Butler
• Lead Animator: Matt Williames
• Animation: Olivier Clert
• Animation: Maxime Delalande
• Producer: Tanguy Olivier
• Animation: Alex Orrelle
• Dialogue Editor: Carlos Sotolongo
• Casting: Micah Dahlberg
• Screenplay: Jim Mahoney
• Executive Producer: Warren Franklin
• Music: Alfonso G. Aguilar
• Production Design: Szymon Biernacki
• Lead Animator: Charlie Bonifacio
• Animation: Jorge A. Capote
• Animation: Borja Montoro
• Animation: Tom Sales
• Character Designer: Torsten Schrank
• Screenplay: Zach Lewis
• Co-Director: Carlos Martínez López
• Editor: Pablo García Revert
• Production Design: Marcin Jakubowski
• Additional Music: Alan Tyler

Credits: TheMovieDb.