Cucumber Castle

Barry Gibb

as Prince Frederick, King of Cucumber / Singer

Maurice Gibb

as Prince Marmaduke, King of Jelly / Singer

Lulu

as Lulu the cook

Spike Milligan

as The Court Jester

Vincent Price

as Wicked Count Voxville

Eleanor Bron

as Lady Margerie Pee

Pat Coombs

as Nurse Sarah

Eric Clapton

as Eric Clapton

Ginger Baker

as Ginger Baker

Steve Winwood

as Steve Winwood

Ric Grech

as Ric Grech

Frankie Howerd

as Dying King

Julian Orchard

as Julian the Lord Chamberlaine

Roger Daltrey

as Roger Daltrey

Mick Jagger

as Mick Jagger

Donovan

as Donovan

Marianne Faithfull

as Marianne Faithfull