Poppy Delevingne and her ex-husband James Cook had an awkward encounter at a London Fashion Week party, underscoring the ongoing social theatre surrounding Britain’s elite during one of the industry’s biggest weeks. The socialite sister of Cara Delevingne, 39, attended the Mert Alas and SEVENTY ONE Gin party at Chiltern Firehouse on Thursday, joined by her boyfriend Archie Feswick, as both navigated what many observers described as a tense but staged run-in with a former spouse.
Cook, 44, arrived with his pregnant fiancée Lauren Brown, in what a source described as a high-profile but carefully managed moment among a guest list that reflected the week’s star power. The gathering, positioned as a fashion-forward launch party, drew designers, models and industry figures, but the closest–in timetable and optics–to a confrontation came from the presence of the two exes and their new partners in the same room. The dynamic offered a microcosm of how London Fashion Week often intertwines personal milestones with professionally choreographed appearances.
Poppy cut a casual-chic silhouette for the occasion, wearing a baggy leather coat over pale blue flared jeans, completed by a black vest, oversized platform boots and a brown Gucci belt as she strolled arm-in-arm with Archie Feswick. James Cook opted for a red-striped shirt, paired with dark trousers, while Brown wore a black mini-dress layered with a varsity jacket as she joined him at the event. The pair’s appearance follows a public arc that has seen both sides move forward with new relationships since their separation years ago.
The pair’s marriage, which dated back to a 2014 ceremony at St Paul’s Church in Kensington, unraveled privately over time, with neither announcing a formal split at the outset. By 2023, Poppy had begun dating Constantine Alexios of Greece and Denmark, a relationship that fueled speculation she and Cook had parted ways for good. In September 2023, Delevingne spoke about the divorce in candid terms, saying she would “always have a good relationship” with Cook but acknowledged that the marriage had run its course. She framed the experience as both dignified and difficult, noting the stigma that can accompany divorce, especially for women in their late thirties who have not yet started a family of their own. “There’s a lot of love and respect there. It just no longer worked for us,” she said, adding that the decision to end a long partnership can feel like a liberation even as it carries its own emotional weight.
Since then, Delevingne has moved on in her personal life. She and Archie Keswick, heir to a prominent family with ties to major business interests, welcomed their daughter Kaia Moon Keswick on May 20, 2025. Delevingne announced the birth in a social-media post featuring a black-and-white image of a hand holding a newborn’s hand, captioned with the date and the name Kaia Moon Keswick. The couple has described their joy publicly, with Delevingne previously revealing she discovered she was pregnant during London Fashion Week while fittings for a Burberry show indicated clothes felt tighter than usual. Archie Keswick comes from the Keswick family, heirs to substantial private wealth and known in London society for high-profile philanthropic and business involvements.
Meanwhile, James Cook has also moved forward with a new chapter. Earlier this month, he shared a photo on Instagram showing Lauren Brown on a Costa del Sol holiday, proudly displaying her baby bump as the couple announced they are expecting their first child together. The post carried a lighthearted tone, in keeping with the couple’s public-facing happiness, and Cook tagged it with the sentiment of welcoming a growing family. He has previously spoken about their engagement after a Bhutan holiday in April, marking a new milestone in his personal life and confirming Brown as his partner as they prepare to welcome a child alongside their existing life plans. The Costa del Sol trip photo was accompanied by messages from friends and fans who celebrated the news, including messages from notable figures in entertainment and fashion who offered congratulations.
The run-in at Chiltern Firehouse illustrated the evolving narratives of two intertwined social figures who remain fixtures of London’s fashion and celebrity circuits. Poppy Delevingne has continued to cultivate her public life in fashion and media, balancing motherhood with a high-profile relationship that has kept her in the public eye. James Cook has likewise kept himself in the spotlight through his business and personal life, with a new family on the horizon. Their shared appearance at the London Fashion Week party did not appear to indicate any direct confrontation or discomfort publicly, but it did highlight how personal milestones can briefly intersect within a setting designed to celebrate style, design and spectacle. The broader context remains a reflection of how the fashion calendar in London often doubles as a social barometer, where old alliances and new partnerships are navigated with the careful choreography that such events demand.