Late 1950s musical comedy starring Tommy Steele. Tommy Hudson (Steele) is a chirpy Cockney lad who bears an uncanny resemblance to a local duke (also played by Steele). When Tommy is sent in the duke's place to woo a princess from an oil-rich South American monarchy, make a political match and save the family fortune, he must overcome the interference of conspiring politicians - not to mention the princess's stubbornness - in his attempts to win her over with his simple charm and cheery serenades. Songs include 'Happy Guitar', 'It's All Happening' and 'My Family Tree'.