Diana, Princess of Wales, died in a Paris car crash on August 31, 1997, and 29 years later designers are still lifting pages straight out of her closet. Two looks in particular refuse to age out: the slouchy, logo-sweatshirt-and-bike-shorts uniform she wore running errands, and the black off-the-shoulder “revenge dress” she wore to a gala the same night her estranged husband admitted infidelity on national television, a moment CNN still calls one of the most quoted outfits in fashion history.

• Diana wore the black cocktail dress on June 29, 1994, to a Vanity Fair summer party at the Serpentine Gallery — the same evening Prince Charles’s televised confession of infidelity aired to roughly 13 million viewers, according to CNN’s retrospective.
• The dress was designed by Christina Stambolian, who recounts on her own site that Diana had owned the piece for three years before finally wearing it that night, after Valentino’s atelier leaked word of the gown she’d originally planned to wear.
• Off duty, Diana’s go-to combo of an oversized sweatshirt, black bike shorts, white sneakers, and a baseball cap has been dubbed “Princess Diana weather” by a new generation discovering her style on social media, per TODAY.
• One of her actual sweaters — the red-trimmed “black sheep” jumper she wore in 1981 — sold at Sotheby’s for more than $1.1 million in 2023, a record for a royal garment, according to ABC News.

The revenge dress didn’t just make headlines that week — it rewired how the public reads a royal wardrobe. Diana had reportedly considered wearing something else entirely, then pivoted at the last minute once news of her original gown got out, according to Stambolian’s own account of the night. The dress had sat in her closet, unworn, for three full years before that decision.

What keeps the look circulating isn’t nostalgia alone — it’s that both halves of Diana’s wardrobe still map cleanly onto how people actually dress now. The off-duty pieces are things anyone can buy: a crewneck, bike shorts, sneakers. Cardi B leaned into exactly that combination — a white Harvard sweatshirt, grey bike shorts, and giant sunglasses — while running errands in 2024, a deliberate nod that Marie Claire noted was a departure from her usual glammed-up looks.

The gala dress, meanwhile, keeps getting quoted on runways and red carpets every time a public figure wants to signal quiet defiance in a single outfit — off-the-shoulder, fitted, unapologetically dark, worn on a night when the easy move would have been to stay home. Twenty-nine years after her death, that’s still the move designers keep borrowing: dress like you have nothing to prove, on the one night everyone’s watching to see if you’ll flinch.

Diana never explained the choice publicly. She didn’t have to. The dress did the talking, and it’s still talking now — on TikTok mood boards, in bridal-adjacent black cocktail dresses, and in every “revenge dress” headline written about someone else’s breakup since.