Colin Farrell

David

Rachel Weisz

Short Sighted Woman

Olivia Colman

Hotel Manager

Léa Seydoux

Loner Leader

Michael Smiley

Loner Swimmer

Ariane Labed

The Maid

John C. Reilly

Lisping Man

Ben Whishaw

Limping Man

Αγγελική Παπούλια

Heartless Woman

Jessica Barden

Nosebleed Woman

Emma O'Shea

Nosebleed Woman's Best Friend

Ashley Jensen

Biscuit Woman

Roger Ashton-Griffiths

Doctor

Anthony Moriarty

30 Year Old Waiter

Sean Duggan

Guard Waiter

Jacqueline Abrahams

Donkey Shooter

Rosanna Hoult

David's Wife

Nancy Onu

Hotel Receptionist

Ewen MacIntosh

Trainer Waiter (Shooting Range)

Sandra Hayden Mason

Arrested Town Woman

Garry Mountaine

Hotel Manager's Partner

Laoise Murphy

New Daughter

Matthew O'Brien

Trapped Loner

Degnan Geraghty

Waiter (uncredited)