 | Glenn Close als Lady Edith de Haviland |
 | Max Irons als Charles Hayward |
 | Stefanie Martini als Sophia de Haviland |
 | Christina Hendricks als Brenda Leonides |
 | Terence Stamp als Chief Inspector Taverner |
 | Honor Kneafsey als Josephine Leonides |
 | Julian Sands als Philip Leonides |
 | Gillian Anderson als Magda Leonides |
 | Christian McKay als Roger Leonides |
 | Amanda Abbington als Clemency Leonides |
 | Preston Nyman als Eustace Leonides |
 | John Heffernan als Laurence Brown |
 | Jenny Galloway als Nanny |
 | David Kirkbride als Sergeant Glover |
 | Tina Gray als Miss Ackroyd |
 | Roger Ashton-Griffiths als Mr Gaitskill |
 | Andreas Karras als Iannois Agrodopolous |
 | Gino Picciano als Aristide Leonides |
 | Madeleine Hyland als Roger Leonides' Secretary |
 | Jacob Fortune-Lloyd als Brent |
 | David Seddon als Constable |
 | David Cann als Coroner |
 | Ani Nelson als Cigarette girl |
 | Trevor Cooper als Cairo Spymaster |
 | Reuben Greeph als Club Singer |
 | A.J. Jenks als Club Band |
| Alex Bellamy als Club Band |
 | James Pattison als Club Band |
 | Timothy Mylechreest als Club Band |
 | Lauren Poveda als Dancer (uncredited) |
| Agatha Christie | Novel |
| Gilles Paquet-Brenner | Director |
| Joseph Abrams | Producer |
| Sebastian Winterø | Director of Photography |
| Gilles Paquet-Brenner | Screenplay |
| Anders Erdén | Executive Producer |
| Compton Ross | Executive Producer |
| James Spring | Producer |
| Lisa Wolofsky | Executive Producer |
| Peter Christelis | Editor |
| Reg Poerscout-Edgerton | Casting |
| Andrew Boswell | Executive Producer |
| Cate Hall | Makeup Designer |
| Julian Fellowes | Screenplay |
| Jay Firestone | Executive Producer |
| Colleen Kelsall | Costume Design |
| Sally Wood | Producer |
| Tim Rose Price | Screenplay |
| Jane Hooks | Co-Producer |
| Mark Hedges | First Assistant Director |
| Simon Bowles | Production Design |
| Hugo de Chaire | Music |
| James Swarbrick | Executive Producer |
| Sarah Nuth | Makeup Artist |
| David Wood | Art Direction |
| Cate Hall | Hair Designer |
| Rob Turner | Sound Effects Editor |
| Rebecca Gillies | Set Decoration |
| Rod Whiting | Property Master |
| Craig Irving | Sound Re-Recording Mixer |
| Kent Houston | Visual Effects Supervisor |
| Charlie Thompson | First Assistant Editor |
| Sarah Nuth | Hairstylist |
| Paul Carter | Sound Designer |
| Simon Lamont | Art Direction |
| Rami Bartholdy | First Assistant Camera |
| Amandine Klee | Camera Operator |
| David Lascelles | Sound Mixer |
| Vidya Krishnamurthy | Key Costumer |
| Tim Hollier | Music Supervisor |
| Sion Clarke | Supervising Art Director |
| Chris Reynolds | Special Effects Supervisor |
| Andy Cole | Gaffer |
| Matt Davies | Dialogue Editor |
| Jim Barne | Orchestrator |
| Nick Wall | Still Photographer |
| Charlie Wyldeck-Flowers | Key Grip |
| Catriona Johnstone | Makeup Artist |
| Drew Jones | Visual Effects Producer |
| Vincent Watts | Music Editor |
| Paul Harris | Choreographer |
| Arabella Gilbert | Production Coordinator |
| Matt Fyson | Armory Coordinator |
| Lillie Jeffrey | Casting Associate |
| Austin Salt-Cowell | Location Scout |
| Katy Covell | Casting Assistant |
| Emily Precious | Associate Producer |
| Ben Gladstone | Location Scout |
| Tamsyn Manson | Casting Assistant |
| Benedict Minghella | Casting Assistant |
| Julien David | Adaptation |
| Rachel Parker | Adaptation |
| Inga Fabian | Production Secretary |
