Jocelyne Katz and Alberto Chehebar met more than two decades ago at a dinner thrown by a mutual friend. The Chilean former model and the art collector began dating shortly after. But even as the years passed, they felt no desire to have a wedding.

“We never thought about getting married. We didn’t feel we needed it. Why change something that is working so well?” Jocelyne tells Vogue.

Everything began to change as they approached their 20th anniversary together. The couple wanted to mark the milestone in a meaningful way—and for a while, they thought maybe they’d do something with close friends and family. “Then after imagining for a while where and how we wanted it to be, we decided.

..why not make it official?” Jocelyne says.

“After 20 years together we both knew we wanted to be together forever.” They enlisted the help of planner Melissa Sullivan, of Studio Sully, to plan their long-in-the-making affair—and on a sunny January afternoon earlier this year, Jocelyne and Alberto finally married at their artist friend Brigitte D’Annibale’s home studio and site-specific installation in Malibu, California. The bride did her own makeup and wore a Gabriela Hearst dress for the occasion.

“At the beginning, I was totally against a white dress,” she says. “Never in my life had I dreamt about my wedding, so at my age, I wasn’t going to suddenly change this.” Jocelyne was converted just a week before the nuptials, when the couple happened to walk by the U.