Up the Chastity Belt (1972)

The identical twin brother of Richard the Lionheart is raised as a peasant, and ends up the servant of a cowardly knight. The quick-witted serf struggles to keep his hapless master out of trouble, until a journey to the Holy Land brings his birthright to light. Medieval comedy, starring Frankie Howerd, Graham Crowden, Bill Fraser, Lance Percival, Eartha Kitt, Anna Quayle and Roy Hudd.