George MacKay
Jack Marrowbone
Anya Taylor-Joy
Allie
Charlie Heaton
Billy Marrowbone
Mia Goth
Jane Marrowbone
Matthew Stagg
Sam Marrowbone
Nicola Harrison
Rose Marrowbone, Mother
Kyle Soller
Tom Porter
Tom Fisher
Simon Fairbairn, Father
Myra Kathryn Pearse
Molly
Paul Jesson
Doctor
Robert Strange
Monster
Laura Brook
Thelma (uncredited)
Adam Quintero
Mr. Gouldman (voice) (uncredited)
Sergio Burmann
Sound Mixer
Kike Maíllo
Second Unit Director
F. Javier Soto
First Assistant Director
Chris Fitzpatrick
Prosthetic Supervisor
Margarita Huguet
Unit Production Manager
Olga Pujalte López
Second Assistant Director
Roberto Bonacini
Stunts
Grace McComisky
Prosthetic Makeup Artist
Pep Parés Font
Third Assistant Director
Roberto Álvarez Espinedo
Property Master
Martí Maluquer
Gaffer
Javier González Leonardo
Key Grip
Celine Gravez
Second Assistant Camera
Nuria Mbomio
Makeup & Hair
Edu Glez
Graphic Designer
Cuco Usín
Stunt Coordinator
Almudena Cormenzana
Production Coordinator
Marc Carreres
Visual Effects Editor
César Solar
Stunt Coordinator
J. A. Bayona
Executive Producer
Sergio G. Sánchez
Director
Sergio G. Sánchez
Writer
Fernando Velázquez
Original Music Composer
Oriol Tarragó
Supervising Sound Editor
Oriol Tarragó
Sound Designer
Marc Orts
Sound Re-Recording Mixer
Denise Kum
Prosthetic Designer
Álvaro Augustín
Producer
Tamara Arévalo
Boom Operator
Marc Gonell
Foley
Xavi Giménez
Director of Photography
Sonia Grande
Costume Design
Pelayo Gutiérrez
Sound Designer
Pelayo Gutiérrez
Supervising Sound Editor
Lucas Fernández
Boom Operator
Marta Monistrol
Foley
Chisko Blanco
Electrician
Ana Charte
First Assistant Editor
Cristina Sánchez Belmonte
Script Supervisor
Elena Ruiz
Editor
Jaime Anduiza
Art Direction
Ghislain Barrois
Producer
Patrick Salvador
Production Design
Glòria Blanes
Script Supervisor
Wanda Morales
Assistant Costume Designer
Sergi Bartrolí
Second Unit Director of Photography
Beatriz Delgado
First Assistant Camera
Ana Cuerda
Assistant Costume Designer
Edu Canet
Camera Operator
Andrea Paralta
Dialogue Editor
Enric Masip
Special Effects Supervisor
Francesc Carreras
First Assistant Camera
Quim Vives
Still Photographer
Emily Jacobs
Casting Associate
Boi Martínez
Foley Editor
Belén Atienza
Producer
Karen Lindsay-Stewart
Casting
Sara Cabrera
Set Costumer
Nacho Martinez
Electrician
Àlex Villagrasa
Visual Effects Supervisor
Daniel Adams
Utility Stunts
Sandra Hermida
Executive Producer
Abraham F. Apresa
Second Assistant Sound
Coque F. Lahera
Other
Chris Lyons
Special Effects Makeup Artist
Jorge Tuca
Producer
Paloma Molina
Executive Producer
Juan Serrano
Special Effects