The dress designer is Oscar de la Renta, and it is a strapless modified A-line ivory silk radzimir gown with long Watteau train. The dress is simple and clean from the front. The back, however, was all drama, with the silk fabric cascading into a cathedral-length train. The entire dress is silk radzimir, and it extremely light weight because the dress consists of only one layer of fabric (not multiple underneath layers). The quality of the silk is what allows the dress to keep its structure.
The dress happened to be designed for Kate Bosworth, and he later incorporated the design into his Signature Bridal Collection. Therefore, videos and additional information about the dress can be found on many sites, including VOGUE.
This dress was professionally altered and professionally dry cleaned. The alternations are what allow the dress to bustle beautifully, as you can see in the photos, and were done in house at Mark Ingram Bridal Atelier in NYC. I am happy to sure additional photos and even a video upon request. I have photos of the dress at every angle, including numerous pictures from all three rounds of alternations.
Please do not hesitate to contact me if you have any additional questions, as I know how important it is to your perfect dress, and I would be thrilled for someone to feel half as beautiful as I did in this classy timeless "less is more" dress, and I owe it all to Kate Bosworth for working with Oscar to design this beauty.