Victor Spinetti
— Dick Deadeye (voice)
Peter Reeves
— Sorceror / Captain of the Pinafore (voice)
George A. Cooper
— The Pirate King (voice)
Miriam Karlin
— Little Buttercup / Utopian Maiden (voice)
John Newton
— Nanki Poo (voice)
Julia McKenzie
— Rose Maybud (voice)
Francis Ghent
— Monarch of the Sea / Major General (voice)
Barry Cryer
— Judge (voice)
Beth Porter
— Yum-Yum / Princess Zara / Queen Victoria (voice)
Linda Lewis
— Yum-Yum (singing voice)
Long John Baldry
— Monarch of the Sea / Major General (singing voice)
Liza Strike
— Rose Maybud (singing voice)
Ian Samwell
— The Pirate King / The Prisoner (singing voice)
Casey Kelly
— Nanki Poo (singing voice)