Colin Farrell as David

Rachel Weisz as Short Sighted Woman

Olivia Colman as Hotel Manager

Léa Seydoux as Loner Leader

Michael Smiley as Loner Swimmer

Ariane Labed as The Maid

John C. Reilly as Lisping Man

Ben Whishaw as Limping Man

Angeliki Papoulia as Heartless Woman

Jessica Barden as Nosebleed Woman

Emma O'Shea as Nosebleed Woman's Best Friend

Ashley Jensen as Biscuit Woman

Roger Ashton-Griffiths as Doctor

Anthony Dougall as 70 Year Old Waiter

Anthony Moriarty as 30 Year Old Waiter

Sean Duggan as Guard Waiter

Roland Ferrandi as Loner Leader's Father

Imelda Nagle Ryan as Loner Leader's Mother

Jacqueline Abrahams as Donkey Shooter

James Finnegan as Bald Man

Robert Heaney as Restaurant Waiter

Rosanna Hoult as David's Wife

Kathy Kelly as Police Officer 1

Kevin McCormack as Police Officer 2

Nancy Onu as Hotel Receptionist

Ewen MacIntosh as Trainer Waiter (Shooting Range)

Patrick Malone as Campari Man

Sandra Hayden Mason as Arrested Town Woman

Garry Mountaine as Hotel Manager's Partner

Laoise Murphy as New Daughter

Ishmael Moalosi as Bandaged Loner

Matthew O'Brien as Trapped Loner

Judi King Murphy as Guest Room 104

Chris Threader as Coach Driver Waiter

Cian Boylan as Piano Player (uncredited)

Clive Dev as Hotel Guest (uncredited)

Degnan Geraghty as Waiter (uncredited)

Heidi Ellen Love as Waitress (uncredited)

Dolores Marren as Waitress (uncredited)

Mark McCormack as Waiter (uncredited)

Stephen Ryan as Hotel Guest (uncredited)