The happy thieves in this international effort are Rex Harrision and Rita Hayworth, both specialists in swiping rare art objects. Their plan to pilfer a priceless Goya involves creating a public diversion at a nearby bullring. Oh, we forgot to tell you: the film was made on location in Madrid, the better for the stars to avoid stiff taxes. Though both seem too old for this sort of fluff, Harrison and Hayworth make the most of the comic opportunities afforded them by the script. Produced by Hayworth's then-husband James Hill, Happy Thieves was based on a novel by Richard Condon, who later turned out such efforts as The Manchurian Candidate and Prizzi's Honor.
by Hal Erickson synopsis