Crown Princess Mary Just Wore the Chicest H&M Dress in Existence

Given fashion's massive contribution to climate change, sustainability is one of the most pressing issues the industry faces—something HRH the Crown Princess of Denmark is more than aware of. As patron of the annual Copenhagen Fashion Summit, the world's largest business event on sustainable fashion, the Danish royal is lending her powerful voice to the movement. "Profit cannot continue to be the primary measure of success," Princess Mary said at the summit this week. "Sustainable transformation must be a business imperative and a core priority."
Not only is she championing the cause with her words, but she's also doing it with her wardrobe. Surely, the princess has access to any designer label under the sun, but to deliver the welcome address on the first day of the Copenhagen Fashion Summit, she chose to wear a dress from H&M's Conscious Collection. The line uses a mix of recycled and organic materials, the latter of which is "grown without chemical pesticides and fertilizers and contains no genetically modified organisms," per H&M's website. Specifically, Princess Mary chose the Silk Dress ($199), which boasts high-quality organic silk and just might be the chicest piece at the retailer right now.
On the second day of the summit, Princess Mary demonstrated another key to sustainability: finding pieces you can wear for years on end. She wore a white midi skirt and Valentino heels, both of which she has been re-wearing for several years. If a stylish royal can hold onto the same pieces for years, everyone else certainly can too. Excessive consumption and disposable fashion hamper the sustainability movement, so we love the princess's practical and relatable approach.
Scroll down to see everything HRH the Crown Princess of Denmark and CEO Eva Kruse wore to the 10th annual Copenhagen Fashion Summit and learn more about the annual event here.
On HRH the Crown Princess of Denmark: H&M Satin Dress ($199)
On HRH the Crown Princess of Denmark: Valentino shoes
On Copenhagen Fashion Summit CEO Eva Kruse: Stella McCartney jumpsuit
Next up, learn about the biodegradable sneakers Stella McCartney spent three years making.

Erin got her start as a Who What Wear intern in 2011—back when the site only published a single story per day. (We have since increased that number twentyfold.) She graduated magna cum laude from USC and lives in Los Angeles. In college, she also interned at Refinery29, where she was promoted to editorial assistant and then assistant editor. After nearly three years at R29, she came back to WWW in 2015, where she is now the Associate Director of Fashion News. From the Oscars to the Met Gala, she leads the site's entire red carpet coverage strategy. She specializes in celebrity and fashion news but also enjoys writing travel features and runway reports. She frequently contributes to WWW's social accounts and has a sizable following on her personal TikTok.
-
It's True: Julia Roberts Just Brought Back Princess Diana's Favorite $70 Sneakers
She just landed in Venice, Italy.
-
Scandi Style, Unfiltered: An Editor's Dispatch From Copenhagen Fashion Week
The Danes do it better.
-
Copenhagen Street Style Is Elite RN—7 Trends I'm Unashamedly Adding to My Wardrobe
I'll be wearing them now and during the fall.
-
Forget Wimbledon Whites—at Centre Court, *This* Was the Summer Shoe Color to Wear With Dresses
It's not black either.
-
Michael Rider Brings a French American Take on Preppy-Bourgeois Style to His Stellar Celine Debut
Inside the spring 2026 collection.
-
6 Fall 2025 Runway Trends I Already Found at Zara, H&M, and Mango
Affordability's never looked so good.
-
From Prada to COS—Here's Everything I Packed and Wore for Milan Fashion Week
A full breakdown.
-
Alix Earle Takes Fashion Risks for Miu Miu (Yes, That Includes Socks With Heels)
Anything for Mrs. Prada.