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