Jacob Tremblay

Orion (voice)

Jack Fisher

Richie Panici (voice)

Werner Herzog

Narrator (voice)

Sky Alexis

Lisa (voice)

Hira Ambrosino

Woman at the Drive-In (voice)

Yoshi Ando

Man at the Drive-In (voice)

Sean Charmatz

Irene's Boss / Cucumber Dentist / Soda / Insomnia Guy 1 (voice)

Walt Dohrn

Stray Cat / Insomnia Guy 2 (voice)

Ren Hanami

Adult Sally (voice)

Amy Hill

Irene (voice)

Aliki Theofilopoulos

Irene's Coworker / Mom / Juice Box / Insomnia Teacher (voice)

Shannon Chan-Kent

Adult Hypatia (voice)

Nick Kishiyama

Tycho (voice)

Paul Walter Hauser

Dark (voice)

Angela Bassett

Sweet Dreams (voice)

Colin Hanks

Adult Orion (voice)

Natasia Demetriou

Sleep (voice)

Golda Rosheuvel

Unexplained Noises (voice)

Nat Faxon

Insomnia (voice)

Aparna Nancherla

Quiet (voice)