Dawn French and Richard Curtis take viewers on a joyful stroll down memory lane as they look back at their favorite Dibley moments, and for the first time, tell the definitive story of the making of the show. The pair are joined by a host of guest stars and celebrity fans including Kylie Minogue, Hugh Bonneville, and Joanna Lumley, as well as writer Paul Mayhew-Archer, producer Jon Plowman, and James Fleet (Hugo Horton).
| Actor | Role |
|---|---|
 Dawn FrenchSelf | Self |
 James FleetSelf | Self |
 Richard CurtisSelf | Self |
| PPaul Mayhew-ArcherSelf | Self |
| JJon PlowmanSelf | Self |
 Howard GoodallSelf | Self |
 Kylie MinogueSelf | Self |
 Hugh BonnevilleSelf | Self |
 Richard ArmitageSelf | Self |
| CClive MantleSelf | Self |
 Mel GiedroycSelf | Self |
 Darcey BussellSelf | Self |
 Joanna LumleySelf | Self |
 Trevor McDonaldSelf | Self |
 Kate BottleySelf | Self |
| JJoy Carroll WallisSelf | Self |
| AAnna HaestrupSelf | Self |
 Julie WaltersNarrator (voice) | Narrator (voice) |
 Emma ChambersSelf (Archive Footage) | Self (Archive Footage) |
 Roger Lloyd PackSelf (Archive Footage) | Self (Archive Footage) |
 Gary WaldhornSelf (Archive Footage) | Self (Archive Footage) |
 Trevor PeacockSelf (Archive Footage) | Self (Archive Footage) |
 John BluthalSelf (Archive Footage) | Self (Archive Footage) |