Lifestyle Style Christie Brinkley's Ex Peter Cook Celebrates His Engagement — and Shows Off Fiancée's Diamond Ring The couple was vacationing in Santorini, Greece on Sept. 15 when Cook popped the question with a six-carat Glenn Bradford diamond ring By Joelle Goldstein Joelle Goldstein Twitter Joelle Goldstein is a TV Staff Editor for PEOPLE Digital. She has been with the brand for nearly five years, beginning her time as a digital news writer, where she covered everything from entertainment news to crime stories and royal tours. Since then, she has worked as a writer-reporter on the Human Interest team and an associate editor on the TV team. In her current role, Joelle oversees all things TV and enjoys being able to say she has to watch The Kardashians and America's Got Talent for "work". Prior to joining PEOPLE, Joelle was employed at The Hollywood Reporter. She graduated from Ithaca College with a Bachelors in Television-Radio (and an appearance in the NCAA Women's Volleyball Final Four!) People Editorial Guidelines Published on October 29, 2019 10:03 PM Share Tweet Pin Email Peter Cook and Alba Jancou are in engagement bliss! One day after PEOPLE confirmed that the Hamptons-based architect had proposed to his 21-year-old girlfriend, Cook, 60, spoke out about the engagement on Instagram — and showed off Jancou’s new, giant sparkler. “SHE SAID YES! 🍾🥂❤️,” he captioned a series of photos from their recent trip to Greece, before quoting F. Scott Fitzgerald. “‘I love her and that’s the beginning and the end of everything’ ❤️❤️❤️.” The headlining photo featured a close-up shot of Cook and Jancou’s hands holding glasses of pink champagne. To the right, Jancou’s six-carat Glenn Bradford diamond ring is displayed. The following two photos were snapped in Santorini — the place where Cook popped the question on Sept. 15 — and featured the newly engaged couple in all-white attire, smiling and kissing for the camera. Everything to Know About Alba Jancou, Peter Cook’s 21-Year-Old Fiancée Shortly after the engagement news had been confirmed on Monday, Cook told PEOPLE, “We are very happy.” In a statement to Page Six, the architect added, “We consider ourselves incredibly lucky to have found, in each other, our soulmate. We are looking forward to many years of wedded bliss!” The outlet reported that Cook asked Jancou to marry him in front of a church while they were vacationing in Santorini. Cook, who shares daughter Sailor, 21 (and adopted Brinkley’s son Jack, 24) with ex-wife Christie Brinkley, has reportedly been dating Jancou for about a year. Mark Sagliocco/Getty Images Christie Brinkley’s Ex-Husband Peter Cook, 60, Engaged to 21-Year-Old College Student The pair have recently been photographed out and about together at events in the Hamptons, including Bobby Flay’s Hamptons Magazine cover celebration in July and the Hampton Classic Horse Show Grand Prix in early September. Jancou’s LinkedIn page, which was viewed by Page Six, but has since been deleted, indicated that she is a current student at Tulane University and expects to graduate in 2021. Prior to her time at the New Orleans, Louisiana college, Jancou “attended a prestigious English private boarding school” called Millfield, which is located in southern England. MediaPunch/Shutterstock This will be Cook’s third marriage. He was previously married to Brinkley from 1996 to 2008. The former couple divorced after Brinkley learned of Cook’s affair with his then-19-year-old assistant Diana Bianchi. Cook then got remarried to Suzanne Shaw, shortly after his cheating scandal broke. The pair split in 2014. After Bianchi came forward in 2007, Cook was also accused of having romantic relations with another former employee, Samantha Cole, who was 18 at the time. He allegedly proposed marriage to her in May 1996 — three months before he became engaged to Brinkley — but she declined.