TV star and fashion designer Ashley Olsen secretly married her longtime boyfriend Louis Eisner in California last week.

The wedding ceremony took place at a private Bel-Air home on Dec. 28, insiders exclusively told Page Six.

Details about the private ceremony remain under wraps and the number of guests – which included the couple's closest family and friends, was small. The low-key affair went late at night "with 50 people or so total," the insider told the outlet.

The "New York Minute" star and 33-year-old Louis had been dating since October 2017 but the elusive couple kept their relationship private and rarely appear together in public. Louis is the son of jewelry designer and former West Coast editor of Vogue, Lisa Eisner, and former president of the David Geffen Company, Eric Eisner.

The only time 36-year-old Ashley and Louis ever appeared on a red carpet together was last September during the celebration for Young Eisner Scholars, a nonprofit organization founded by Louis' father.

Ashley sparked engagement rumors in 2019 after she was photographed wearing a dark band on her left ring finger while out on a movie date in Los Angeles with Louis. In 2021, the artist took to his Instagram page and uploaded a photo of Ashley holding a machete in her right hand and a cold beverage in her left hand while out hiking in the woods. Louis did not write a caption to his post but he followed it with another snap of himself standing on a log over a pond.

Ashley and her twin sister Mary-Kate explained in 2021 why they choose to keep certain matters out of the spotlight.

"We were raised to be discreet people," Mary-Kate said as she talked about the modest style of their fashion label, The Row.

Ashley added, "We really didn't want to be in front of it. We didn't necessarily even want to let people know it was us, in a way. I mean, it was one of those things where it was really about the product, to the point where we're like, 'Who could we get to kind of front this so we don't have to?' I think, to this day, you'll see we really put the product first."

Mary-Kate Ashley Olsen
Mary-Kate Olsen and Ashley Olsen attended the "Manus x Machina: Fashion In An Age Of Technology" Costume Institute Gala at the Metropolitan Museum of Art on May 2, 2016, in New York City. Getty Images