Colin Farrell (David), Rachel Weisz (Short Sighted Woman), Léa Seydoux (Loner Leader), Ben Whishaw (John), Ariane Labed (The Maid), John C. Reilly (Robert), Jessica Barden (Nosebleed Woman) more..., Olivia Colman (Hotel Manager), Ashley Jensen (Biscuit Woman), Angeliki Papoulia (Heartless Woman), Michael Smiley (Loner Swimmer), Jacqueline Abrahams (Donkey Shooter), Roger Ashton-Griffiths (Doctor), Anthony Dougall (70 Year Old Waiter), Sean Duggan (Guard Waiter), Roland Ferrandi (Loner Leader's Father), James Finnegan (Bald Man), Robert Heaney (Restaurant Waiter), Rosanna Hoult (David's Wife), Jaro (Bob the Dog), Ryac (Bob the Dog), Kathy Kelly (Police Officer 1), Ewen MacIntosh (Trainer Waiter (Shooting Range)), Patrick Malone (Campari Man), Sandra Hayden Mason (Arrested Town Woman), Kevin McCormack (Police Officer 2), Ishmael Moalosi (Bandaged Loner), Anthony Moriarty (30 Year Old Waiter), Garry Mountaine (Hotel Manager's Partner), Judi King Murphy (Guest Room 104), Laoise Murphy (New Daughter), Imelda Nagle Ryan (Loner Leader's Mother), Nancy Onu (Hotel Receptionist), Matthew O'Brien (Trapped Loner), Emma O'Shea (Nosebleed Woman's Best Friend), Chris Threader (Coach Driver Waiter)

Tessa Ross (Executive Producer), Jina Jay (Casting), Carole Scotta (Co-Producer), Andrew Lowe (Executive Producer), Ed Guiney (Producer), Eileen Buggy (Hair Designer), Joost de Vries (Co-Producer) more..., Leontine Petit (Co-Producer), Yorgos Mavropsaridis (Editor), Sam Lavender (Executive Producer), Yorgos Lanthimos (Screenplay), Yorgos Lanthimos (Producer), Efthymis Filippou (Screenplay), Danny van Spreuwel (Sound Re-Recording Mixer), Danny van Spreuwel (Dialogue Editor), Pierre Buffin (Visual Effects Supervisor), Louise Kiely (Casting), Christos V. Konstantakopoulos (Co-Producer), Thimios Bakatakis (Director of Photography), Jacqueline Abrahams (Production Design), Sarah Blenkinsop (Costume Design), Johnnie Burn (Sound Designer), Johnnie Burn (Sound Re-Recording Mixer), Ceci Dempsey (Producer), Lee Magiday (Producer), Cait Collins (Line Producer), Derk-Jan Warrink (Co-Producer), Mark Kelly (Art Direction), Jack Kuiper (Digital Intermediate), Olivier Cauwet (Visual Effects Supervisor), Dave Moran (Script Supervisor), Thyrza Ging (Casting Associate), John McKenna (Armorer), Jessica Timlin (Assistant Art Director), Karen Scully (Casting Associate), Amy Ashworth (Music Supervisor), Barry Conroy (Gaffer), Kristina Prilukova (Visual Effects Producer), Ronnie van der Veer (Foley), Simon Carroll (Sound Effects Editor) and others.