The late Princess Diana’s infamous “revenge dress,” which she wore on the same night then-Prince Charles admitted his infidelity, is going up for auction. The then-Princess of Wales attracted attention when she arrived at the Serpentine, one of London’s most famous art galleries, on a warm June afternoon in 1994, dressed in a figure-hugging dress for a fundraising dinner hosted by Vanity Fair. 6:04 Prince Harry asked Princess Diana’s brother for advice on changing his last name Previous video Next video Story continues below ad Within minutes, a wall of photographers showed his silk-laden silhouette to the world, and the look soon became a generational statement. More than three decades later, he is back in the spotlight. Christina Stambolian’s black off-the-shoulder evening dress will go on sale for the first time in almost 30 years on December 9. The designer garment, which auction house Sotheby’s described as “an enduring symbol of confidence and self-possession,” is expected to fetch an estimated value of between $150,000 and $300,000. (£110,000 to 220,000). Get the latest national news Get the latest Canadian news delivered to your inbox as it happens so you don’t miss any breaking news. It will be presented and displayed at Sotheby’s London from September 18, ahead of further exhibitions in Hong Kong, Geneva and New York. FILE: Diana, Princess of Wales during a party at the Serpentine Gallery in London. On the same day that Charles admitted that he had been unfaithful to Diana during a television interview, Diana appeared at the Serpentine Gallery in what was called her revenge dress, a figure-hugging, low-cut, off-the-shoulder little black ensemble. AP Photo/Files Princess Diana and then-Prince Charles, who would later admit his infidelity on television the night of the fundraiser, had been separated for nearly two years when she stepped out in the off-the-shoulder dress, with an asymmetrical hem and dramatic chiffon train. News of her extramarital affairs leaked days before the formal announcement, so “Diana knew that whatever she chose to do that night, as the show was broadcast to millions of people, would inevitably have meaning and be interpreted as a response,” Sotheby’s writes. “The princess had long considered the dress too daring to wear in public, and it had remained unworn in her wardrobe for three years, but on that historic day, she decided the time was right for it,” her stylist at the time, Anna. Harvey, who had helped her prepare for the evening, told the auction house. More on Entertainment More Videos Diana simply “wanted to look a million dollars,” she said, noting that the late princess had initially opted to wear a more traditional Valentino dress. Morgane Halimi, global head of handbags and fashion at Sotheby’s, says the dress’s legacy has come to embody much more than a poignant fashion moment. “What became a global viral moment, long before social media made the term mundane, also gave license to anyone, but especially women, to use fashion beyond adornment and in much more intentional and meaningful ways: as a shield, a weapon, or both,” she continued. “What has endured through the decades is not the scandal surrounding that night, but Princess Diana’s display of confidence and self-possession.” She added: “She entered a time where much of her story was being told to her, and through what she chose to wear, she reclaimed the narrative for herself.” The dress was last sold in June 1997, when the late princess sold 79 of her dresses at an auction to raise funds to benefit cancer and AIDS charities. Proceeds from the sale of the dress later this year will be donated to NHS Lothian Charity on behalf of the Royal Edinburgh Hospital. © 2026 Global News, a division of Corus Entertainment Inc.