Jacob Tremblay

Orion (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)

Ike Barinholtz

Light (voice)

Carla Gugino

Orion's Mom (voice)

Matt Dellapina

Orion's Dad (voice)

Nick Kishiyama

Tycho (voice)

Mia Akemi Brown

Hypatia (voice)

Shannon Chan-Kent

Adult Hypatia (voice)

Jack Fisher

Richie Panici (voice)