The Secret of My Success is a 1965 British black comedy film from American writer-director Andrew L. Stone, starring James Booth, Shirley Jones, Stella Stevens, Honor Blackman, and Lionel Jeffries (in four roles).

A police constable solves two high-profile cases with help from his mother. He becomes the leader of a South American country through becoming the figurehead of its revolution. The new leader later inherits millions from an earl, but makes the mistake of naming his mother as his heir. His mother kills him to get the inheritance.