Frankie Howerd
— Ko-Ko Flintridge
Stubby Kaye
— Judge Herbert Mikado / Charlie Hotfleisch
Mike Winters
— Mike
Bernie Winters
— Bernie
Tommy Cooper
— Pooh-Bah, Private Detective
Dennis Price
— Ronald Fortescue
Jacqueline Jones
— Katie Shaw
Kevin Scott
— Hank Mikado
Jill Mai Meredith
— Yum-Yum
Lionel Blair
— Nanki
Pete Murray
Tsai Chin
Glen Mason
Al Mulder
Dermot Walsh
Carole Shelley
C. Denier Warren
Murray Kash
Yvonne Shima
Kenji Takaki
Frank Olegario
Burt Kwouk
— Art teacher (uncredited)
Marianne Stone
— Espresso waitress (uncredited)
Michael Winner
— Aeroplane passenger (uncredited)