The model and entrepreneur said "I do" in a surprise ceremony.
Karlie Kloss followed in the footsteps of influencer Chiara Ferragni by opting for a custom Dior gown.
The American model's dress echoed Ferragni's, with its long sleeved lace bodice and full ballgown skirt.
The former Victoria's Secret Angel and her longterm beau, Joshua Kushner, announced their engagement three months ago after six years of dating.
Kushner is a financier, whose brother Jared is married to Ivanka Trump.
The couple are believed to have tied the knot in a "small, Jewish ceremony in upstate New York, with under 80 people in attendance."
The 6'2" stunner kept her big day look simple, accessorising with diamond stud earrings and a silver pendant.
It's been a major week for the 26-year-old, who just last week was announced as the 'new Heidi Klum' as she will step in to host hit fashion design show Project Runway.