Some tangled trivia The only other movie musical with "Rio" in its title was 1933's Flying Down to Rio, the film that first paired Fred Astaire and Ginger Rogers. It was produced by Merian C. Cooper, who earlier the same year, had produced, directed and co-written King Kong , a film at the opposite end of the cinema spectrum. A supporting actress in Flying Down to Rio was Dolores del Rio -- who was not from Rio but from Durango, Mexico. Cooper, incidentally, had been a pilot in the Polish army following World War I and had gone on to become one of the founders of Pan American World Airways and to serve on its board. (He's the pilot in the plane that finally shoots down King Kong.) An arch-conservative, he backed Senator Joseph McCarthy's anti-communist crusade in the early 50's. Del Rio, by contrast, became one of the early victims of the Hollywood blacklist and was forced to flee to her native Mexico, not to return to the U.S. until 1960, when she played Elvis Presley's mother in Flaming Star .