Carla Gugino Orion's Mom (voice)
Jacob Tremblay Orion (voice)
Angela Bassett Sweet Dreams (voice)
Colin Hanks Adult Orion (voice)
Ike Barinholtz Light (voice)
Nat Faxon Insomnia (voice)
Amy Hill Irene (voice)
Paul Walter Hauser Dark (voice)
Charlie Kaufman Writer
Golda Rosheuvel Unexplained Noises (voice)
Shannon Chan-Kent Adult Hypatia (voice)
Werner Herzog Narrator (voice)
Walt Dohrn Executive Producer, Stray Cat / Insomnia Guy 2 (voice)
Natasia Demetriou Sleep (voice)
Justin Ridge Additional Storyboarding
Kent Osborne Story Artist
Steve Slanec Supervising Sound Editor
Sean Charmatz Irene's Boss / Cucumber Dentist / Soda / Insomnia Guy 1 (voice), Director
Jack Fisher Richie Panici (voice)
Laura Macias Foley Artist
Tim Nielsen Sound Re-Recording Mixer, Supervising Sound Editor, Sound Designer
Hira Ambrosino Woman at the Drive-In (voice)
Aparna Nancherla Quiet (voice)
Brandon Proctor Sound Re-Recording Mixer
Ren Hanami Adult Sally (voice)
Joe Pitt Character Designer
Jason Oliver Dialogue Editor
D.J. Lynch Sound Re-Recording Mixer
Matt Dellapina Orion's Dad (voice)
Benjamin Plessala Additional Voices (Voice)
Nick Kishiyama Tycho (voice)
Kaan Kalyon Story Artist
Julien Bocabeille Animation
Young Ki Yoon Additional Storyboarding
Nico Marlet Character Designer
Lloyd Taylor Additional Writing
Matthew Bordenave Story Artist
Rob McIntyre Supervising Sound Editor
Tom Caulfield Additional Storyboarding
Matthew Festle Sound Editor, Sound Effects
Hans Dastrup Head of Animation
Jesse Aclin Character Designer
Brandon Sawyer Additional Writing
Marc Schmidt Sound Designer
Sky Alexis Lisa (voice)
Ania O'Hare Casting
Robert Lydecker Original Music Composer
Alyssa Lee Irene's Daughter / Insomnia Girl (voice)
Timothy Lamb Production Designer, Character Designer
Hanna Kim Additional Storyboarding
Brent Hutchins Line Producer
Leo Matsuda Visual Development
Jeff Halbert Sound Designer
Greg Sharp Animation
Bonnie Arnold Executive Producer
Jordan Rosato Story Artist
Andy Schuhler Visual Development
Elaine Wu Visual Development
Toru Uchikado Insomnia Man (voice)
Eric Elrod Additional Storyboarding
Jessey Drake Sound Designer
Aliki Theofilopoulos Irene's Coworker / Mom / Juice Box / Insomnia Teacher (voice)
Guillaume Fesquet Visual Development
Nathan Nance Sound Re-Recording Mixer
Ritchie Sacilioc Visual Development
Vincent Deng Foley Artist
Alexandra Nickson Music
Ruben Perez Visual Development
Kevin Lax Original Music Composer
Vivian Aguiar-Buff Music
Shawn Krause Supervising Animator
Adam Rosette Head of Story