Sebastien Perrin and Maud Laceppe

Perrin, in a Saint Laurent shirt and RRL jeans, and Laceppe, in a Céline top, Phi pants, and Hermès boots, at Perrin’s New York apartment.

The makeup artist Maud Laceppe loves to paint a face—just not her own. “Sometimes I’ll wear red lips,” she says. “When I feel tired.” And while the Paris-born New Yorker adores fashion, rarely does she go out in anything dressier than jeans and a T-shirt; for evening, she merely adds her favorite pair of Manolo Blahnik pumps. “It’s my uniform,” she explains. “Cool and timeless.” Her boyfriend, Sebastien Perrin, is equally low-key when it comes to matters of style, pairing Saint Laurent shirts and Rick Owens sweatshirts with beat-up jeans and a pair of Nikes. “I find I always wear something new with something kind of abused,” says the French DJ, who creates runway soundtracks for Bottega Veneta, Oscar de la Renta, and Altuzarra, among others. The two met 15 years ago backstage at a Chanel show. They were working as assistants then—she to the makeup maestro Stéphane Marais; he to the sound stylist Michel Gaubert—and have been dating on and off for the past eight years. It was during an off period that Perrin gave Laceppe the chunky gold Vhernier ring that she wears every day, along with her Hermès bracelets and a tangle of chain necklaces. “I was trying to win her back,” Perrin explains. And, according to Laceppe, “it worked.”