Na de scheiding van zijn ouders woont de 12-jarig Conor bij zijn moeder. Zij is ernstig ziek geworden en daarom krijgen ze vaak bezoek van zijn oma met wie Conor geen goede relatie heeft. Op school wordt hij door zijn klasgenoten gepest.
Nee, helaas is A Monster Calls nog niet beschikbaar op Netflix in Nederland.
| Writing | Patrick Ness | Screenplay |
| Directing | J. A. Bayona | Director |
| Visual Effects | Ferran Domenech | Visual Effects Supervisor |
| Writing | Patrick Ness | Novel |
| Writing | Siobhan Dowd | Idea |
| Production | Belén Atienza | Producer |
| Art | Eugenio Caballero | Production Design |
| Production | Sarah Wheale | Line Producer |
| Production | Sandra Hermida | Co-Producer |
| Sound | Fernando Velázquez | Original Music Composer |
| Editing | Bernat Vilaplana | Editor |
| Editing | Jaume Martí | Editor |
| Production | Patrick Ness | Executive Producer |
| Production | Jeff Skoll | Executive Producer |
| Production | Shaheen Baig | Casting |
| Production | Ghislain Barrois | Executive Producer |
| Costume & Make-Up | Stephen Noble | Costume Design |
| Production | Mitch Horwits | Executive Producer |
| Production | Enrique López Lavigne | Executive Producer |
| Camera | Óscar Faura | Director of Photography |
| Production | Sandra Hermida | Executive Producer |
| Production | Bill Pohlad | Executive Producer |
| Art | Ravi Bansal | Art Direction |
| Art | Dídac Bono | Art Direction |
| Production | Álvaro Augustin | Executive Producer |
| Art | Jaime Anduiza | Art Direction |
| Art | Pilar Revuelta | Set Decoration |
| Production | Jonathan King | Executive Producer |
| Production | Patrick Wachsberger | Executive Producer |
| Crew | Tom Holland | Stand In |
| Crew | Steve Joberns | Thanks |
| Visual Effects | Félix Bergés | Visual Effects Supervisor |
| Visual Effects | Pau Costa | Special Effects Supervisor |
| Costume & Make-Up | Marese Langan | Makeup Designer |
| Costume & Make-Up | Marese Langan | Hair Designer |
| Sound | Oriol Tarragó | Sound Designer |
| Crew | Montse Ribé | Makeup Effects |
| Crew | David Martí | Makeup Effects |
| Production | Margarita Huguet | Unit Production Manager |
| Crew | Víctor Martí | Post Production Supervisor |
| Art | Andrey Ryabovichev | Concept Artist |
| Art | Emma Saunders | Graphic Designer |
| Sound | Martí Albert | Sound Effects Editor |
| Sound | Manuel Carrión | Foley Artist |
| Camera | Celine Gravez | Second Assistant Camera |
| Lighting | Víctor Sarasa | Electrician |
| Directing | Mónica Sánchez | Second Assistant Director |
| Art | Abner Marín | Sculptor |
| Camera | Esther Mestres | Second Assistant "C" Camera |
| Directing | Marc Rial | Second Assistant Director |
| Sound | Shaun Mills | Boom Operator |
| Crew | Paul Lowe | Stunt Double |
| Sound | Laura Díez Mora | Dialogue Editor |
| Sound | Don Hoffman | Sound Re-Recording Mixer |
| Camera | David Valldepérez | Camera Operator |
| Costume & Make-Up | Anna Aguilà | Costume Supervisor |
| Sound | Jaime Gutiérrez Domínguez | Orchestrator |
| Directing | Eugenio Mira | Second Unit Director |
| Directing | Fernando Trullols | First Assistant Director |
| Art | Joseph Díaz | Concept Artist |
| Visual Effects | Peter McDonald | Visual Effects Supervisor |
| Camera | Quim Vives | Still Photographer |
| Production | Maryllis Gonzalez | Production Accountant |
| Directing | Anna Capdevila | Third Assistant Director |
| Art | Marc Estrugo | Set Designer |
| Sound | Marc Orts | Sound Re-Recording Mixer |
| Visual Effects | Ainara Castro | Visual Effects Producer |
| Camera | Javier González Leonardo | Key Grip |
| Camera | José Haro | Still Photographer |
| Editing | Ana Charte | Assistant Editor |
| Crew | Kieran O'Neal | Floor Runner |
| Art | Jason Bond | Property Master |
| Visual Effects | Wasselena Bilak | Visual Effects Coordinator |
| Camera | Oriol Busquets | Camera Operator |
| Visual Effects | Alberto Bernad | VFX Editor |
| Production | Jen Rooks | Production Coordinator |
| Directing | Ruben Goldfarb | Second Assistant Director |
| Visual Effects | Marcel Cifré | VFX Editor |
| Crew | Elizabeth Himelstein | Dialogue Coach |
| Costume & Make-Up | Kelly Zampogna | Makeup Artist |
| Sound | Kyle D. Krajewski | ADR Mixer |
| Visual Effects | Geraint Hixson | Visual Effects Coordinator |
| Camera | Edward Botham | Second Assistant Camera |
| Crew | Patricia Johnson | Unit Publicist |
| Crew | Anita Primett | Studio Teacher |
| Art | Richard Rowntree | Greensman |
| Crew | Chus Lucas | Stunt Double |
| Camera | Jordi Florensa | First Assistant Camera |
| Production | Inés Font | Post Production Coordinator |
| Crew | Sarah Shepherd | Dialect Coach |
| Crew | Jaume Martí | Post Production Supervisor |
| Sound | Jose Ruiz | Foley Editor |
| Camera | Albert Carreras | Camera Operator |
| Production | Layla Merrick-Wolf | Casting Associate |
| Production | Carmen Romero | Extras Casting |
| Production | Lyndsey Haluszczak | Assistant Production Coordinator |
| Art | Ariel Margolis | Property Master |
| Sound | Marc Bech | Sound Effects Editor |
| Visual Effects | Srinivas Janapati | Visual Effects Coordinator |
| Camera | Thomas Barrera | Camera Trainee |
| Camera | Yousef El Awage | Epk Camera Operator |
| Production | Josué Corral | Assistant Production Manager |
| Camera | Guillem Huertas | First Assistant "A" Camera |
| Lighting | José Luis Rodríguez | Gaffer |
| Art | Javier López Antía | Assistant Property Master |
| Art | Florian Müller | Set Designer |
| Art | Sean Sevestre | Concept Artist |
| Sound | Albert Ribas | Dialogue Editor |
| Crew | Cuco Usín | Stunt Coordinator |
| Camera | Miquel Auguet | Second Assistant Camera |
| Lighting | Debora Witte | Electrician |
| Production | Goyo Gámez | Unit Manager |
| Crew | Tiger Rudge | Stunts |
| Camera | Ramón Sánchez | Steadicam Operator |
| Directing | Glòria Blanes | Script Supervisor |
| Crew | Cristina Malillos | Makeup Effects |
| Directing | Jesus Espin | Third Assistant Director |
| Directing | Jan Zalar | Second Assistant Director |
| Crew | Ian van Temperley | Stunt Coordinator |
| Editing | Queralt González | Assistant Editor |
| Crew | Natalie Wickens | Special Effects Best Boy |
| Crew | Alvaro Garcia Gonzalez | Quality Control Supervisor |
| Costume & Make-Up | Angela Cardin | Makeup Artist |
| Visual Effects | Ángel Martínez | Modeling |
| Visual Effects | Jose Angel Moran | Pre-Visualization Supervisor |
| Visual Effects | Miguel Ángel Sánchez-Arévalo | VFX Artist |
| Visual Effects | Emiliano Nanfaro | Visual Effects Supervisor |
| Crew | José Antonio González Ledesma | Driver |
| Visual Effects | Glenn Amonitti | Opening/Ending Animation |
| Visual Effects | Nairye Apelian | Visual Effects Assistant Editor |
| Visual Effects | Piotr Weiss | Pre-Visualization Coordinator |
| Visual Effects | Piotr Weiss | Pre-Visualization Coordinator |
| Visual Effects | Guillaume Fabre | Digital Film Recording |
| Visual Effects | Guillaume Laforge | Visual Effects Compositor |
| Visual Effects | Guillaume Duchaussoy | Visual Effects Assistant Editor |
| Visual Effects | Ángel Rico Riesgo | Digital Compositor |
