Dior PR director Mathilde Favier and producer Nicolas Altmayer die in western France car crash

Fatal collision in Deux-Sèvres

French film producer Nicolas Altmayer and Christian Dior public relations director Mathilde Favier died in a traffic collision on Monday, 17 August 2026. The crash occurred at approximately 16:00 on departmental road 938 in the municipality of Airvault, located in the northern area of the Deux-Sèvres department northwest of Poitiers. Altmayer, aged 61, and Favier, aged 57, were traveling together in a Mini when their vehicle struck an oncoming heavy goods vehicle. Preliminary findings released by regional authorities indicate that the collision occurred while their car was executing an overtaking maneuver against another vehicle on the two-lane route. Emergency response personnel were dispatched to the scene near Thouars, but neither occupant survived the impact. The driver of the oncoming truck sustained no physical injuries.

Investigation opened by prosecutors

The public prosecutor office in Niort withheld the formal identities of the victims until Tuesday morning before confirming the details of the crash. Niort deputy prosecutor Nicolas Leclainche announced that authorities have initiated a judicial inquiry into involuntary manslaughter caused by a driver. Investigators detained and questioned the truck driver following the collision. Initial toxicological screenings conducted by law enforcement confirmed that the truck driver tested negative for both alcohol and narcotics. The ongoing investigation focuses on establishing the precise mechanical, environmental, and behavioral conditions surrounding the overtaking attempt.

Leadership and tributes at Dior

Favier had served as the director of public relations for Dior Couture for more than a decade, managing celebrity partnerships and front-row attendance at Paris Fashion Week. She previously worked at Italian fashion house Prada before joining Dior, where her sister Victoire de Castellane works as creative director of high jewelry. Beyond her brand management duties, Favier published the lifestyle book Mathilde à Paris in 2024, featuring contributions from personal acquaintances including Carla Bruni. Following the confirmation of her death, Christian Dior chief executive officer Delphine Arnault paid tribute to her career at the fashion house.

Mathilde loved life with passion. With the death of Mathilde, Dior loses an incredible professional, and I lose a loyal friend. Her optimism and courage were admirable. We will deeply miss her smile and her talent. I am deeply saddened today; my thoughts are with her children, her mother, her sisters, her family, her many friends, and her team, whom she loved so much.

LVMH chairman and chief executive officer Bernard Arnault also expressed condolences through an official Dior statement, recognizing Favier for dedicating years of passion, energy, and talent to the fashion house.

Nicolas Altmayer's cinema career

Altmayer established a significant presence in the French film industry after co-founding the production company Mandarin Cinéma with his brother Éric Altmayer. Over a career spanning several decades, he produced more than 50 feature films and television series, accumulating multiple nominations at the César Awards. His production portfolio included commercial comedies such as Brice de Nice and the OSS 117 film series starring Jean Dujardin. Altmayer also produced critically recognized auteur films, including François Ozon's Frantz and Jeune et Jolie, as well as recent productions such as Julia Ducournau's Alpha and the biographical film Monsieur Aznavour starring Tahar Rahim.