 | Julia McKenzie als Granny |
 | Reece Buttery als Ben |
 | David Walliams als Mike |
 | Miranda Hart als Linda |
 | Rob Brydon als Mr Parker |
 | Joanna Lumley als The Queen |
 | Robbie Williams als Flavio Flavoli |
 | Harish Patel als Raj |
 | Claudia Winkleman als Herself |
 | Steve Speirs als PC McClintock |
 | Patrick Brennan als Beefeater |
| George Hill als Terrence |
 | India Ria Amarteifio als Florence |
 | Leo Wringer als Doctor Long |
| Tim Frances als Doctor Edwards |
| Russell Dixon als Judge |
 | Tim Bentinck als Chief Inspector |
 | Max Olesker als Policeman |
| Matt Lipsey | Director |
| David Walliams | Novel |
| Kevin Cecil | Adaptation |
| Andy Riley | Adaptation |
| Mark Freeland | Executive Producer |
| Sue Longstaff | Associate Producer |
| Jo Sargent | Producer |
| David Arnold | Original Music Composer |
| Michael Price | Original Music Composer |
| Tim Palmer | Director of Photography |
| Joe Randall-Cutler | Editor |
| John Cannon | Casting |
| Julia Crampsie | Casting |
| Arwel Jones | Production Design |
| Samantha Jay Cliff | Art Direction |
| Annie Hardinge | Costume Design |
| Lisa Cavalli-Green | Makeup Designer |
| Lisa Cavalli-Green | Hair Designer |
| Helen Conroy | Makeup Artist |
| Roxana Habibi | Makeup Artist |
| Annabelle McMahon | Makeup & Hair |
| Saskia Whinney | Unit Manager |
| Jim Imber | First Assistant Director |
| Christian Rigg | Second Assistant Director |
| Timothy Wood | Third Assistant Director |
| Jenny Anderson | Visual Effects Supervisor |
| Barney Curnow | Visual Effects Supervisor |
| Ray De-Haan | Stunt Coordinator |
| Danny Crocker | Focus Puller |
| Ian Glenister | Gaffer |
| Jon Howard | Focus Puller |
| Darren Johnson | Clapper Loader |
| James Leckey | First Assistant Camera |
| Claire Pie | Clapper Loader |
| Barney Piercy | Second Assistant Camera |
| Suzanne Sanders | Rigging Gaffer |
| Debbie Roberts | Assistant Costume Designer |
| Alexander Leask | Colorist |
| Gary Scullion | Assistant Editor |
| Saskia Whinney | Location Manager |
| Karen Jones | Script Supervisor |
| Nikki Chamberlin | Production Accountant |
| Gary Moyes | Still Photographer |
| Katie Neal | Production Coordinator |
| Jo Wellings | Choreographer |
