| Barry Gibb |
Prince Frederick, King of Cucumber |
| Maurice Gibb |
Prince Mamaduke, King of Jelly |
| Frankie Howerd |
Dying King |
| Eleanor Bron |
Lady Margerie Pee |
| Pat Coombs |
Nurse Sarah Charles Bottom |
| Julian Orchard |
Julian the Lord Chamberlaine |
| Spike Milligan |
Court Jester |
| Vincent Price |
Wicked Count Voxville |
| Lulu |
Lulu |
| Roger Daltrey |
Self |
| Donovan |
Self |
| Marianne Faithfull |
Self |
| Mick Jagger |
Self |
| Eric Clapton (as Blind Faith) |
Musical Performer |
| Ginger Baker (as Blind Faith) |
Musical Performer |
| Steve Winwood (as Blind Faith) |
Musical Performer |
| Ric Grech (as Blind Faith) |
Musical Performer |
| Peter Blythe |
Narrator |
