Christie Brinkley's Ex-husband Peter Cook, 60, Engaged to 21-Year-old College Student

Peter Cook, the ex-husband ofChristie Brinkley, is headed for the altar again. The 60-year-old, Hamptons-based architect recently got engaged to his 21-year-old girlfriend Alba Jancou, PEOPLE confirms. “We are very happy,” Cook tells PEOPLE. The couple was vacationing in Santorini, Greece, on Sept. 15 when Cook popped the question with a six-carat Glenn Bradford diamond ring in front of a church,Page Six reports. “We consider ourselves incredibly lucky to have found, in each other, our soulmate,” Cook added in a statement to Page Six.

Christie Brinkley's Most Iconic Swimsuit Photos, from 'Sports Illustrated' to Her Own Sexy Selfies

01of 17SIZZLING AT 65Christie Brinkley/InstagramThe model recently posted a series ofsexy vacation pictures to her Instagram, turning ashoreline stroll into her own personalSports Illustrated-like photo shoot. 01of 17 SIZZLING AT 65 Christie Brinkley/Instagram The model recently posted a series ofsexy vacation pictures to her Instagram, turning ashoreline stroll into her own personalSports Illustrated-like photo shoot. 02of 17PALMS AWAYChristie Brinkley/InstagramBrinkley’s cover-up collection is just at cute as her bikini wardrobe. 02of 17

Christie Brinkley's Son Jack Brinkley-Cook Launches New Ride-Sharing Service to the Hamptons

Photo: Taylor Ballantyne Christie Brinkley’s son is reinventing the way New Yorkers travel to the Hamptons. Jack Brinkley-Cook, son of the famed supermodel, launched a newride-sharing servicecalled Rove last week, aimed at young travelers swapping the Big Apple for some big waves. Brinkley, 65, was a proud parent as she celebrated 24-year-old Jack’s accomplishments onInstagram. “…And not just for the young and cool you may just spot an old relic like me on @ridewithrove although the cool may rub off of me and then watch out!

Christie Brinkley, 64, Twins with 20-Year-Old Daughter Sailor Brinkley Cook in Sexy Workout Gear

Photo: Mark Sagliocco/Getty Like mother, like daughter! Christie Brinkley, 64, and daughterSailor Brinkley Cook, 20, showed off their fit physiques and twinned in workout gear at the Southampton Sweat event this weekend. While Christie dressed in head-to-toe white for the Hamptons event, including a mesh Alo top, cropped leggings, sports bra and athletic sneakers, Sailor showed her abs in an olive Adidas sports bra and leggings. Nearly two years ago, Christie and Sailor, along with Alexa Ray Joel,posed together in bikinisfor theSports IllustratedSwimsuit Issue, which Sailor called a “very empowering and liberating” experience.

Christie Brinkley, 65, and Daughter Sailor, 20, Walk the Runway Together at New York Fashion Week

Christie BrinkleyandSailor Brinkley-Cookenjoyed some mother-daughter modeling atNew York Fashion Week. The supermodel mom, who just turned 65 on Feb. 2, and her 20-year-old daughter Sailor (with ex-husband, architect Peter Cook) both walked the runway together at theElie Taharishow on Thursday in New York City. Brinkley wore an emerald velvet suit and matching scarf, while her look-a-like daughter sported a short, party-ready dress with embellished beaded sleeves and over-the-knee boots. The duo high-fived as they passed each other on the catwalk, bringing high energy to the room.