 | Forest Whitaker als Idi Amin |
 | James McAvoy als Dr. Nicholas Garrigan |
 | Simon McBurney als British Diplomat |
 | Gillian Anderson als Sarah Merrit |
 | Kerry Washington als Kay Amin |
 | David Oyelowo als Dr. Thomas Junju |
 | Abby Mukiibi Nkaaga als Masanga |
 | Adam Kotz als Dr. David Merrit |
 | Barbara Rafferty als Mrs. Garrigan |
 | David Ashton als Dr. Garrigan - Senior |
| Sarah Nagayi als Tolu |
 | Stephen Rwangyezi als Jonah Wasswa |
| Sam Okelo als Bonny |
 | Dick Stockley als Times Journalist |
 | Chris Wilson als Perkins |
 | Daniel Ssettaba als Kay Amin's Servant |
 | Giles Foden als British Journalist 1 |
 | Andrew Williams als British Journalist 2 |
| Martina Amati als Italian Journalist |
 | Devon Diep als Nurse (uncredited) |
| Tessa Ross | Executive Producer |
| Jina Jay | Casting |
| Anthony Dod Mantle | Director of Photography |
| Andrew Macdonald | Executive Producer |
| Lisa Bryer | Producer |
| Suzanne Warren | Producer |
| Andrea Calderwood | Producer |
| Peter Morgan | Screenplay |
| Tina Jones | Set Decoration |
| Michael Carlin | Production Design |
| Sharon Martin | Hair Designer |
| Carsten Richter | Foley |
| Kevin Macdonald | Director |
| Jeremy Brock | Screenplay |
| Giles Foden | Novel |
| Christine Ruppert | Producer |
| Ros Borland | Producer |
| Allon Reich | Executive Producer |
| Andrew Wood | Line Producer |
| Alex Heffes | Original Music Composer |
| Justine Wright | Editor |
| Mags Horspool | Art Direction |
| Michael O'Connor | Costume Design |
| Charles Steel | Producer |
| Simon Channing Williams | Thanks |
| Gary Connery | Stunt Coordinator |
| Rebecca Alleway | Set Decoration |
| Dixie Chassay | Casting Assistant |
| Stephen Haren | Assistant Editor |
| Eddie Stacey | Stunt Coordinator |
| Adam Inglis | Color Timer |
| Marcus Alexander | Digital Intermediate |
| Cathy Doubleday | Script Supervisor |
| Lynne Huitson | Supervising Art Director |
| Derek Ritchie | Assistant Director |
| Suzanne Belcher | Makeup Artist |
| Sebastian Bulst | Special Effects Supervisor |
| Matt Curtis | Title Graphics |
| Julian Kershaw | Orchestrator |
| Jan Brun | Grip |
| Neil Davidson | Still Photographer |
| Dianne Jamieson | Makeup Artist |
