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
Natasia Demetriou Sleep (voice)
Aparna Nancherla Quiet (voice)
Walt Dohrn Executive Producer, Stray Cat / Insomnia Guy 2 (voice)
Jack Fisher Richie Panici (voice)
Kent Osborne Story Artist
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
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
Ren Hanami Adult Sally (voice)
Aliki Theofilopoulos Irene's Coworker / Mom / Juice Box / Insomnia Teacher (voice)
Matthew Bordenave Story Artist
Robert Lydecker Original Music Composer
Nico Marlet Character Designer
Hira Ambrosino Woman at the Drive-In (voice)
Rob McIntyre Supervising Sound Editor
Toru Uchikado Insomnia Man (voice)
Peter McCown Producer
Tom Caulfield Story Artist
Lloyd Taylor Additional Writing
Guillaume Fesquet Visual Development
Matt Dellapina Orion's Dad (voice)
Hanna Kim Story Artist
Adam Rosette Head of Story
Ritchie Sacilioc Visual Development
Ruben Perez Visual Development
Nick Kishiyama Tycho (voice)
D.J. Lynch Sound Re-Recording Mixer
Julien Bocabeille Animation
Brent Hutchins Line Producer
Matthew Festle Sound Editor, Sound Effects
Johane Matte Story Artist
Adrianna A.J. Cohen Executive Producer
Kaan Kalyon Story Artist
Hans Dastrup Head of Animation
Kevin Lax Original Music Composer
Shawn Krause Supervising Animator
Jessey Drake Sound Designer
Timothy Lamb Production Designer, Character Designer
Eric Elrod Story Artist
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