Breakfast at Tiffany's (film) made capturing the scene a challenge. However, another report claims that the sequence was captured rather quickly due to the good fortune of an unexpected traffic lull. 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
Audrey Hepburn review in "Variety" read, "Hepburn has her most demanding film role, and she gives her finest performance", while "Films in Review" stated that her performance "will forever silence those who have thought her less an actress than a symbol of the sophisticated child/woman. Her portrayal of Sister Luke is one of the great performances of the screen." Reportedly, she spent hours in convents and with members of the Church to bring truth to her portrayal, stating that she "gave more time, energy, and thought to this than to any of my previous screen performances". Following "The Nun's Story", Hepburn received