A Monster Calls

Lily-Rose Aslandogdu as Lily Lewis MacDougall as Conor James Melville as Harry Geraldine Chaplin as The Head Teacher (uncredited) Ben Moor as Mr. Clark Dominic Boyle as Anton Frida Palsson as Lily's Mum Liam Neeson as The Monster (voice) Jake Talbot as Rollercoaster Boy (uncredited) Felicity Jones as Mum Morgan Symes as Lawyer Sigourney Weaver as Grandma Toby Kebbell as Dad Jennifer Lim as Miss Kwan Wanda Opalinska as Female Nurse

Laura Pedro Visual Effects Supervisor Patrick Wachsberger Executive Producer Jeff Skoll Executive Producer Montse Ribé Makeup Effects Ferran Domenech Visual Effects Supervisor Oriol Busquets Camera Operator David Martí Makeup Effects Oriol Tarragó Sound Designer Enrique López Lavigne Executive Producer Eugenio Caballero Production Design Marc Orts Sound Re-Recording Mixer Bill Pohlad Executive Producer Fernando Trullols First Assistant Director Fernando Velázquez Original Music Composer Tom Holland Stand In Guillem Huertas First Assistant "A" Camera Patrick Ness Screenplay, Novel, Executive Producer Jonathan King Executive Producer Ramón Sánchez Steadicam Operator José Luis Rodríguez Gaffer Bernat Vilaplana Editor Marc Bech Sound Effects Editor Eugenio Mira Second Unit Director J.A. Bayona Director Óscar Faura Director of Photography Diego Álvarez Stunts Paul Lowe Stunt Double David Valldepérez Camera Operator Cuco Usín Stunt Coordinator Ian van Temperley Stunt Coordinator Martí Albert Sound Effects Editor