Mathilde Favier’s death alongside her husband Nicolas Altmayer has shocked fashion, prompting emotional tributes from leading figures across Paris and beyond.
The fashion world is mourning Mathilde Favier, the influential International PR Director at Dior Couture, following her tragic death at the age of 57. Favier and her husband, French film producer Nicolas Altmayer, died in a car accident on Monday, 17 August 2026, in Deux-Sèvres, France.
According to information attributed to the Niort public prosecutor’s office, the couple’s car was involved in a collision with a lorry. The news has sent shockwaves through an industry in which Favier had spent years cultivating relationships with designers, celebrities, editors and some of Dior’s most prominent ambassadors.
More than simply a communications executive, Mathilde Favier was one of the most recognisable figures behind Dior Couture’s international image. Her ability to connect the Parisian maison with leading personalities made her an important presence at fashion shows, red carpets and major cultural events around the world.
Following confirmation of her death, friends and colleagues including Adriana Abascal, Carla Bruni, Jonathan Anderson, Carine Roitfeld and Beatrice Borromeo shared deeply personal tributes.
Abascal remembered Favier alongside photographs taken in Seville, where Dior previously staged a spectacular show at Plaza de España. She described her as a woman whose heart, elegance and extraordinary talent had influenced countless people, calling her “unique and irreplaceable” and describing her death as an immense loss for her children, friends, Paris and fashion.
Carla Bruni expressed disbelief at the news, remembering Favier as a source of warmth and happiness for those closest to her. The model and singer described her friend as someone capable of radiating joy even during difficult moments and highlighted the love and generosity she brought to her roles as a friend, mother, sister and daughter.
At Dior, the sense of loss has been equally profound. Creative director Jonathan Anderson paid tribute to Favier’s contribution to the house, emphasising the dedication and energy she brought to her work. He described her as extraordinarily positive and optimistic, as well as the embodiment of elegance and, in many respects, the spirit of Haute Couture itself.
Spanish designer María de la Orden, who is based in Paris, also recalled Favier’s generosity and enthusiasm. Her tribute focused on the encouragement she received from the Dior executive throughout her career, remembering a woman who supported others, offered advice and possessed an unmistakable ability to bring energy into any room.
Fashion editor Carine Roitfeld offered another portrait of Favier’s personality, describing her as radiant, joyful and quintessentially Parisian. Her words echoed a recurring theme across the many tributes: beyond Favier’s considerable professional influence, friends remembered her above all for her humour, warmth and unmistakable joie de vivre.
Among the most emotional messages was that shared by her son, Carlo Agostinelli, from her marriage to Robert Agostinelli. He wrote about the difficulty of processing the sudden loss of his mother, describing her as the embodiment of life and joy and reflecting on the extraordinary depth with which she loved those around her.
His tribute prompted a message of support from Victoria Federica de Marichalar, who sent her condolences to Carlo, Heloise and the entire family while remembering the happiness associated with Favier.
Beatrice Borromeo, wife of Pierre Casiraghi and a Dior ambassador, also shared an intimate farewell. Rather than focusing on sadness alone, she recalled the warmth she still felt when thinking about Favier: her smile, stories, wit, laughter and youthful spirit beneath an exceptionally elegant exterior.
The flood of tributes demonstrates the unusual position Mathilde Favier occupied within Paris fashion. She worked behind the scenes, yet became a familiar and beloved presence to many of the people who define the industry publicly.
Her death, alongside Nicolas Altmayer, leaves family, friends and colleagues confronting a sudden loss. For Dior and the wider fashion community, however, the messages shared in her memory reveal a legacy extending far beyond public relations: that of a woman remembered for connecting people through elegance, generosity and an irrepressible sense of joy.
