A Monster Calls Cast and Crew

Main Cast: Lewis MacDougall as Conor O'Malley

Main Cast: Liam Neeson as The Monster (voice)

Main Cast: Sigourney Weaver as Conor's grandmother

Supporting Cast: Felicity Jones as Conor's mother

Supporting Cast: Toby Kebbell as Conor's father

Supporting Cast: Lily-Rose Aslandogdu as Lily

Director: Juan Antonio Bayona

Writer: Patrick Ness