Carla Gugino Orion's Mom (voice)
Angela Bassett Sweet Dreams (voice)
Colin Hanks Adult Orion (voice)
Jacob Tremblay Orion (voice)
Amy Hill Irene (voice)
Paul Walter Hauser Dark (voice)
Ike Barinholtz Light (voice)
Nat Faxon Insomnia (voice)
Charlie Kaufman Writer
Werner Herzog Narrator (voice)
Golda Rosheuvel Unexplained Noises (voice)
Kent Osborne Story Artist
Shannon Chan-Kent Adult Hypatia (voice)
Walt Dohrn Executive Producer, Stray Cat / Insomnia Guy 2 (voice)
Jack Fisher Richie Panici (voice)
Natasia Demetriou Sleep (voice)
Aparna Nancherla Quiet (voice)
Brandon Proctor Sound Re-Recording Mixer
Nick Kishiyama Tycho (voice)
Bonnie Arnold Executive Producer
Joe Pitt Character Designer
Sean Charmatz Irene's Boss / Cucumber Dentist / Soda / Insomnia Guy 1 (voice), Director
Steve Slanec Supervising Sound Editor
Tim Nielsen Sound Designer, Sound Re-Recording Mixer, Supervising Sound Editor
Shawn Krause Supervising Animator
Tom Caulfield Story Artist
Kaan Kalyon Story Artist
Kevin Lax Original Music Composer
Benjamin Plessala Additional Voices (Voice)
Nik Ranieri Supervising Animator
Nico Marlet Character Designer
Nathan Nance Sound Re-Recording Mixer
Ren Hanami Adult Sally (voice)
Jason Oliver Dialogue Editor
Toru Uchikado Insomnia Man (voice)
Aliki Theofilopoulos Irene's Coworker / Mom / Juice Box / Insomnia Teacher (voice)
Jon Magram Story Artist
Laura Macias Foley Artist
Lloyd Taylor Additional Writing
Brandon Sawyer Additional Writing
Hira Ambrosino Woman at the Drive-In (voice)
Adam Rosette Head of Story
Julien Bocabeille Animation
Jessey Drake Sound Designer
Matt Dellapina Orion's Dad (voice)
Hanna Kim Story Artist
Brent Hutchins Line Producer
Rob McIntyre Supervising Sound Editor
Matthew Festle Sound Editor, Sound Effects
Sky Alexis Lisa (voice)
Guillaume Fesquet Visual Development
Bruno Etchepare Animation
Lyle Nagy Story Artist
Jesse Aclin Character Designer
D.J. Lynch Sound Re-Recording Mixer
Timothy Lamb Production Designer, Character Designer
Ania O'Hare Casting
Kevin Turcotte Matte Painter
Leo Matsuda Visual Development
M. Scott McKee Visual Effects Supervisor
Lauren Zurcher Visual Development
Peter McCown Producer
Andy Schuhler Visual Development
Ritchie Sacilioc Visual Development
Jessica Kaori Stanley Story Artist
Johane Matte Story Artist
Hans Dastrup Head of Animation
Dylan Stayman Assistant Editor
Michael Pedraza Associate Editor
Robert Lydecker Original Music Composer
Matthew Bordenave Story Artist
Katy Wu Visual Development