| Stephanie Leonidas | ... Helena / Anti-Helena |
| Jason Barry | ... Valentine |
| Rob Brydon | ... Morris Campbell / Prime Minister |
| Gina McKee | ... Joanne / Queen of Light / Queen of Shadows |
|
| Dora Bryan | ... Aunt Nan |
| Stephen Fry | ... Librarian |
| Andy Hamilton | ... Small Hairy |
| Simon Harvey | ... Sphinx |
| Lenny Henry | ... Cops 1-4 |
| Robert Llewellyn | ... Gryphon |
| Eryl Maynard | ... Mrs. Bagwell |
| Eve Pearce | ... Future Fruit Lady |
| Nik Robinson | ... Pingo / Bing |
| Victoria Williams | ... Nurse |
|
| Circus Performers |
| Rick Allen | ... Man In a Box |
| Gina D'Angelo | ... Heir of Insanity Woman |
| Simon Schofield | ... Heir of Insanity Man |
| Silvia Fratelli | ... Mimbre |
| Lina Johansson | ... Mimbre |
| Emma Norin | ... Mimbre |
| Peachi Pangea | ... Pyrotechnic Artist |
| Mark Tate | ... Stilt Walker |
| Richard Thompson | ... Tat -- The Strongman / Gorilla |
| Robin Thompson | ... Magician |
|
| Circus Band |
| Iain Ballamy | ... Band Leader and Soprano Sax |
| Chris Batchelor | ... Trumpet |
| Stian Carstensen | ... Button Accordion |
| Martin France | ... Drum Kit |
| Stuart Hall | ... Violin and Banjo |
| Dave Powell | ... Sousaphone |
| Trifon Trifanov | ... Alto Sax |
|
| Peter Borroughs | ... Red Troll |
| Rusty Goffe | ... Yellow Gnome |
| Kerry Jay | ... Music Box Dancer |
| Fiona Reynard | ... Receptionist |
| Nick Dainton | ... Politician / Monkeybirds |
| Nick Jackson | ... Male Giant / Mr. Shoe-Thing / Monkeybirds |
| Mark Perry | ... Politician / Monkeybirds |
| Kate Robbins | ... Female Giant / Mrs. Shoe-Thing / Chicken |
