Sorry, it really isn't. She was well known for her small A cup breasts and never had any augmentation done, and the woman shown is very well endowed with large impressive breasts. Audrey was very skinny, and again I point out the model in the picture has curves that Ms Hepburn never had in any of her movies.
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This is Audrey Hepburn in a rare bikini shot, and she doesn't have the breasts, hips, ass, or even the legs of the woman in the picture you shar
That's the point, no real nudes of her have ever been published or are even rumored to exist. Your picture is clearly not the skinny flat chested actress Audrey Hepburn. Your denial of the facts doesn't make it any less true!