 During the film, Hepburn sang the film's signature song, "Moon River" by Henry Mancini and Johnny Mercer.The song was tailored to Hepburn's limited vocal range, based on songs she had performed in 1957's "Funny Face".On the Anniversary Edition DVD of "Breakfast at Tiffany's" co-producer Richard Shepherd says in his audio commentary that after a preview in San Francisco, Martin Rankin, Paramount's head of production, wanted "Moon River" replaced with music by somebody like Gordon Jenkins (whose album "Manhattan Tower" had been out fairly recently)