Tom Hiddleston

Charles 'Chuck' Krantz

Benjamin Pajak

Charles 'Chuck' Krantz (pre-teen)

Nick Offerman

Narrator (voice)

Chiwetel Ejiofor

Marty Anderson

Karen Gillan

Felicia Gordon

Mia Sara

Sarah Krantz

Mark Hamill

Albie Krantz

Annalise Basso

Janice Halliday

Jacob Tremblay

Charles 'Chuck' Krantz (teen)

Samantha Sloyan

Miss Rohrbacher

Trinity Jo-Li Bliss

Cat McCoy

David Dastmalchian

Josh

Matthew Lillard

Gus

Kate Siegel

Miss Richards

Rahul Kohli

Bri

Harvey Guillén

Hector

Saidah Arrika Ekulona

Andrea

Carl Lumbly

Sam Yarbrough

Michael Trucco

Dylan's Dad

Q'orianka Kilcher

Virginia 'Ginny' Krantz

Violet McGraw

Iris

Andrew Grush

Mac

Heather Langenkamp

Vera Stanley

Franklin Ritch

Brent

Antonio Raul Garcia

Brian Krantz

Molly C. Quinn

Chuck's Mother

Sauriyan Sapkota

Ram

Mike Flanagan

Mourner

Matt Biedel

Doctor Winston

Carla Gugino

News and Commercial Voice (voice)

Elan Gale

Radio News Reporter (voice)

Scott Wampler

Radio Host #2 (voice)

Hamish Linklater

American Reporter (voice)

Axelle Carolyn

French Reporter (voice)

Sandra Hess

German Reporter (voice)

Lauren LaVera

Italian Reporter (voice)

Trevor Macy

Mourner (uncredited)