 | Nicole Kidman als Christine |
 | Colin Firth als Ben |
 | Mark Strong als Dr. Nasch |
 | Ben Crompton als Warehouse Caretaker |
 | Anne-Marie Duff als Claire |
 | Adam Levy als Ben |
 | Gabriel Strong als Boy on Bike |
 | Flynn MacArthur als Boy in Dream |
 | Dean-Charles Chapman als Adam |
 | Jing Lusi als Nurse Kate (uncredited) |
| Rosie MacPherson als Emily (uncredited) |
| Steve Munroe als Warehouse Worker (uncredited) |
 | Kevin Hudson als Man on Bike (uncredited) |
| Samantha Kelly als Nurse with Austrian Accent (uncredited) |
| Rowan Joffe | Director |
| Rowan Joffe | Screenplay |
| S.J. Watson | Novel |
| Mark Gill | Producer |
| Avi Lerner | Producer |
| Liza Marshall | Producer |
| Matthew O'Toole | Producer |
| Ben Davis | Director of Photography |
| Melanie Oliver | Editor |
| Nina Gold | Casting |
| Kave Quinn | Production Design |
| Tim Blake | Art Direction |
| John West | Art Direction |
| Niamh Coulter | Set Decoration |
| Michele Clapton | Costume Design |
| Tina Earnshaw | Makeup Department Head |
| Rebecca Lafford | Makeup Artist |
| Alex Rouse | Wigmaker |
| Paul Hanks | Foley |
| James Mather | Supervising Sound Editor |
| Luke O'Connell | Sound Effects Editor |
| Chris Burdon | Sound Re-Recording Mixer |
| Markus Moll | Sound Re-Recording Mixer |
| Alan Banis | Visual Effects Supervisor |
| Luke Redgrave | Camera Operator |
| David Smith | Gaffer |
| Demetri Jagger | Video Assist Operator |
| Calandra Meredith | Set Costumer |
| Rob Farris | Digital Intermediate |
| Patrick Malone | Digital Intermediate |
| Alex Kalmakrian | First Assistant Editor |
| Michael Connell | Music Editor |
| Paula Casarin | Script Supervisor |
| Sandra Frieze | Dialect Coach |
| Ian Hutchinson | Location Manager |
| Ian Thomson | Unit Publicist |
| Jason Wheeler | Location Manager |
| Paul Edwards | Steadicam Operator |
| Mark Raggett | Supervising Art Director |
| Ed Shearmur | Original Music Composer |
| Julian Spencer | Stunt Coordinator |
| Jane Oginsky | Assistant Makeup Artist |
| Waldo Mason | Prosthetics |
| Mark Goddard | First Assistant Director |
| Paul Morris | Second Assistant Director |
| Yasmin Alvarez | Art Department Assistant |
| Katie Money | Art Department Assistant |
| Mark Keene | Carpenter |
| Jessica Sinclair | Concept Artist |
| Paul Bowring | Construction Manager |
| Julia Dehoff | Draughtsman |
| Piero Jamieson | Props |
| Gregor Telfer | Props |
| Rachel Aulton | Standby Art Director |
| John Marzano | Aerial Director of Photography |
| Emma Friend | Clapper Loader |
| Tim Neill | Electrician |
| Rory Moles | First Assistant Camera |
| Leigh Gold | First Assistant "A" Camera |
| Lewis Hume | First Assistant "B" Camera |
| Paolo Frasson | Key Grip |
| Will Finch | Lighting Technician |
| Dominique Cheung | Second Assistant Camera |
| James Perry | Second Assistant "A" Camera |
| Tommy Holman | Second Assistant "B" Camera |
| Laurie Sparham | Still Photographer |
| Rob Killick | Dialogue Editor |
| Boaz Davidson | Executive Producer |
| Scott Keery | Property Master |
| Simon Hayes | Production Sound Mixer |
