Among all wardrobe essentials, cardigan sweater seems the least essential and the least exciting. It could be substituted by a soft jacket, a turtle neck sweater does not need it as a cover to look complete, and with just a little bit careless in the texture, the fit, a cardigan sweater can look dull, plain or even shabby.

But on Audrey Hepburn's body, a cardigan sweater look soft, subtle, at times poetic. And she can tell a story with it. In the film The Children's Hour, the simple cardigan sweater thrown around Audrey Hepburn's shoulders carried so much emotions in a very delicate situation.

In early May, Grace Kelly went to Cannes France for the 8th Cannes Festival, the editor of Paris Match Pierre Galante, then husband of American actress Olivia de Havilland, suggested that Grace Kelly have a photo shoot in the Prince's Palace of Monaco(Palais princier, Monaco) then a meeting with Prince Rainier III. Grace Kelly was reluctant at the beginning, but she decided to say yes.

On 6 May 1955, after some difficult start and the late arrival of Prince Rainier of Monaco, Grace Kelly finally met him, they took a walk around in the palace, then Grace Kelly left for her other engagement.

For the meeting, Grace Kelly wore a square necked floral dress with long sleeves and drop waist.

About 7 month later in January 1956, Grace Kelly and Prince Rainier of Monaco announced their engagement publicly, and three months after the engagement, on 19 April 1956, the couple were married in St. Nicolas Cathedral, Monaco.

The floral dress Grace Kelly wore on 6 May 1955 thus became the most symbolic dress in connection with her future as Princess of Monaco.

It is a taffeta dress of long sleeves with floral print, featuring square neckline and drop waist, it was designed by McCall Patterns for Grace Kelly, who appeared on the company's Spring patternbook of 1955.