The wedding was a royal event held following the end of the Second World War. The dress, designed by the Court Designer, had a star-patterned bridal train that was 13 feet (4.0 m) in length. The train, symbolic of rebirth and growth after the war, was stated to be inspired by Botticelli’s c. 1482 painting of Primavera, particularly the elaborate embroidery motifs of scattered flowers on the rich satin dress and the tulle veil worn by the royal bride. The material used was ivory silk and a diamond fringe tiara secured her veil. The dress was decorated with crystals and 10,000 seed pearls, imported from United States of America. Norman Hartnell, who had been Court Designer since 1938 and who was the designer of the dress, claimed it as "the most beautiful dress I had so far made".
On account of the austerity measures following the war, Princess Elizabeth was given hundreds of clothing coupons by brides-to-be from all parts of the country, which helped her buy the material for the dress.
The designs for the dress were approved three months before the wedding. Hartnell's search for suitable designs in London art galleries had led to him to the Botticelli figure. This was the inspiration for the use of ivory silk with flower designs of jasmine, smilax, lilac and white rose-like blossoms added to the train, embellished by white crystals and pearls. These motifs were transferred to drawings to enable embroidery experts to work on them. The silk cloth was chosen at the specific directive of her mother, the Queen, who desired an “unusually rich, lustrous stiff satin which was made at Lullington Castle". The silkworms to manufacture the silk were bought from Nationalist China and not the then enemy countries of Japan and Italy, which were termed as "enemy silkworms". Satin was chosen for the train, and a more flexible material of the same tone as the train was chosen for the dress. However, in spite of the careful choice of the silk, the curator of the London Museum observed 30 years later when the dress was on display at the museum that “the choice of silk was not a good one” as the fabric had deteriorated. It was also noted that the "weight of the embroidery dragged the skirt down, increasing the strain on the weave.”
The design of the dress was kept secret, and the dress was taken to the palace a day before the wedding in a 4 feet (1.2 m) box. On the wedding day, the dress glittered, bejewelled with pearls “skilfully combined with flowing lines of wheat ears, the symbol of fertility, and worked in pearl and diamante.”
Princess Elizabeth's wedding dress has drawn parallels with both the similarly designed dress worn by Grace Kelly in 1956 and the "Westminster décor" wedding dress that Sarah Burton at Alexander McQueen designed for Catherine Middleton; particular points of similarity have been highlighted in the pleats and silhouette of the skirt