What are you wearing?

It’s the most frequently asked question at any red carpet event. At last night’s Met Gala, the theme of which was “Superfine: Tailoring Black Style,” some attendees gave an unusual answer.

“I’m wearing Courrèges and eBay,” said Emma Chamberlain, who was hosting Vogue’s livestream of the glamorous fund-raiser for the Metropolitan Museum of Art’s Costume Institute.

Jeremy Pope, the actor and singer, was similarly described as wearing a vintage Maison Margiela vest and “custom eBay tailored trousers.”

No, the online resale marketplace known for offering everything from used cars to Pokémon cards has not started a luxury fashion label. Rather, eBay has been one of the official sponsors of the Met Gala since 2024, and the numerous shout-outs to the company before, during and after the splashy event seemed to be a conspicuous reminder.

“I’m here with Burberry, but all of my accessories were sourced on eBay,” Law Roach, the stylist, was quoted as saying in The Hollywood Reporter, referring to a Tiffany brooch, Cartier ring and Patek Philippe watch. “eBay is such a place to find treasures.”

It was Mr. Roach who styled Mr. Pope; the pair were featured in a TikTok video posted yesterday to the official eBay account, which noted how they were “helped by eBay” to source Mr. Pope’s sartorial tribute to Black dandyism.