Here's why it's difficult to pinpoint:
* Givenchy created many designs for Hepburn: Hubert de Givenchy was Audrey Hepburn's long-time friend and designer, creating countless iconic looks for her throughout her career.
* Hepburn wore white dresses often: White was a prominent color in her wardrobe, and she often wore white dresses with floral accents. These could range from simple cotton dresses to elaborate gowns.
* No specific dress has a definitive name: Unlike some of her most famous outfits (like the little black dress in "Breakfast at Tiffany's"), there isn't a widely accepted name for a specific white floral Givenchy dress worn by Audrey Hepburn.
To find the dress you're looking for, you might need to provide more information:
* Specific film or event: Was the dress worn in a particular movie or event?
* Image: Do you have a picture of the dress in question?
* Details: Can you describe the dress further (e.g., floral pattern, length, style)?
With more information, we can narrow down the possibilities and hopefully identify the specific dress you're interested in!