Malfaisante

Jessica Chastain

Mommy / Other Mommy

Jay Duplass

Daddo

Arabella Olivia Clark

Bela

Karen Allen

Grandma Ruth

Arian Moayed

Uncle Frank

Dichen Lachman

Lois Anthony

Sean Kaufman

Kelvin

Adam Silver

Brian

Alec Secăreanu

Ruiss

Millie Wood

Little Girl

Travis Nelson

Tony

Carrie Dimaculangan

Callie

Erin Birgy

Erin

Hayley Spelman

Other Mommy (Creature)

Rosie Anne O'Gorman

Tube Kid 1

Alejandro Nieves

Tube Kid 2

Jessica Pennington

Additional Creature Voices (voice)

Ellen O'Callaghan

Bela Double 1