Barnaby Thompson Director, Producer Olivia Cooke Pixie Actor Alec Baldwin Father Hector McGrath Actor Ben Hardy Frank McCullen Actor Daryl McCormack Harland McKenna Actor Colm Meaney Dermot O'Brien Actor Ned Dennehy Seamus Actor Sebastian de Souza Gareth Actor Dylan Moran Actor Chris Walley Actor Preston Thompson Screenwriter James Clayton Producer Samantha Allwinton Executive Producer Peter Touche Executive Producer John de Borman Cinematographer Robbie Morrison Film Editing David Holmes Original Music Gerry Diver Original Music Nicola Moroney Production Design Francis Taaffe Art Director Kevin McCabe Set Decoration Hazel Webb-Crozier Costume Design Reg Poerscout-Edgerton Casting Carla Stronge Casting