Fashion dresses

As of my last update, the title for the most expensive cocktail dress could vary depending on how you define "cocktail dress" and whether you're considering dresses sold at auction, custom pieces, or retail items.

One notable example includes the "Diamond Cocktail Dress" designed by Debbie Wingham, which is adorned with diamonds and has been reported to cost around $15 million. This dress is embellished with a red diamond, one of the rarest and most expensive diamonds in the world, along with black and white diamonds, all set in platinum. It also features intricate handmade embroidery.

In retail, luxury brands like Chanel, Dior, and others often sell cocktail dresses that can cost tens of thousands of dollars, depending on the materials used and the complexity of the design. These dresses might feature high-quality fabrics, hand embroidery, precious stones, and other luxurious embellishments.

It's important to note that prices can vary widely based on the exclusivity of the design, the reputation of the designer, and the materials used. For the most current and specific details, direct inquiries to luxury boutiques or high-end fashion retailers might be more accurate.