Everyone in Monaco Looks Elegant, But Sofia Richie Grainge Outdid the Populace in This Black-Tie Gown

Nicknamed "the billionaire's playground," Monaco is one of the richest countries in the world when measured by GDP per capita. Smaller than NYC's Central Park, the region is jam-packed with yachts, Michelin-starred restaurants, and luxury hotels. Residents of this tax haven love wearing the newest designer pieces, but Sofia Richie Grainge decided to take a different approach.
During a trip to Monaco, Richie Grainge wore an archival gown from Yves Saint Laurent's S/S 79 collection. Yep, that means her 46-year-old dress is nearly double her age. On the runway, the gown was styled with a red coat, but Richie Grainge was wise to ditch the outerwear for her seaside summer night. Scroll down to see her new Instagram post, which has amassed over 100,000 likes in a matter of hours, and shop similar dresses for your next black-tie wedding.
On Sofia Richie Grainge: Saint Laurent S/S 79 dress and Minaudière ($3700)
Shop Similar Gowns

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.
-
Sambas Aren't "Out," But If You Want to Wear Them in 2025, You Should Style Them Like This
Fresh and elegant.
-
It's Here: The It-Girl Sweater Trend of Fall 2025
Kaia Gerber has solidified it.
-
Nicole Richie's Anti-Trend Pants Look Good With Sandals, Boots, Flats, *and* Sneakers
It's true.
-
If You're Going to Wear Leggings in 2025, Please Only Wear Them Like This, This, and This
Courtesy of our favorite stylish celebrities.
-
J.Lo Just Wore the Dated Shoe Trend That Magically Becomes Chic When Paired With White Jeans
Now I wish I hadn't donated my old pair.
-
I'm Calling It Now: The Coolest Fall Denim Outfits Won't Include Black *or* Blue Jeans
The denim trend was just spotted on Jennifer Lawrence.
-
Predicting Taylor Swift's Wedding Dress: 5 Styles That Feel So Her
It's a love story, baby, just say yes—to the dress.
-
Taylor Swift Just Got Engaged in the Ring Trend You'll Be Seeing Everywhere for the Next Decade
Guaranteed.