Mathilde Favier, the longtime Dior public relations director who died in a fatal car crash in France on August 17, 2026, lived much of her professional life in the public eye while keeping many details of her personal relationships relatively private.
Following news of her death at age 57, interest has grown around Favier’s family, including her former husbands, children and longtime partner. Publicly available reports identify Robert Agostinelli and Olivier Meyer as men Favier had previously married. At the time of her death, she was in a long-term relationship with French film producer Nicolas Altmayer.
Robert Agostinelli
Robert Agostinelli was one of the most prominent figures connected to Favier’s personal life.
An Italian-American financier, Agostinelli is best known as a co-founder of private equity firm Rhone Group. His career has included major investments and an extensive network across international business and finance.
Favier and Agostinelli had two children together, Héloïse and Carlo. Their children have subsequently attracted some public attention of their own, particularly through their connections to European society and business circles.
The couple eventually divorced, although Favier continued to have a family connection with Agostinelli through their children.
Unlike many celebrity relationships, their marriage was not built around Favier’s own fame. Her professional reputation grew primarily through her work in luxury fashion, while Agostinelli was already established in international finance.
Olivier Meyer
Favier was also previously married to Olivier Meyer, another relationship mentioned in reporting about her personal history.
Compared with Agostinelli, significantly less publicly documented information is available about Meyer and his marriage to Favier.
That relative lack of information reflects a broader feature of Favier’s personal life. Although her career placed her alongside famous actors, designers, models and executives, she generally maintained a degree of separation between her professional world and her private relationships.
As a result, details such as the precise dates of her marriage to Meyer and the circumstances surrounding their separation have not been extensively documented by major publications.
Her Children
Favier’s marriage to Agostinelli resulted in two children, Héloïse and Carlo.
Her son Carlo Agostinelli has received attention in international society coverage, partly because of his family background and his relationship with British tennis star Emma Raducanu. That connection has brought the Agostinelli family into wider entertainment and sports coverage.
Favier herself was known for balancing her role as a mother with an exceptionally demanding international career.
Working as Dior’s public relations director meant operating at the intersection of fashion, celebrity culture and luxury business. Her professional calendar involved major fashion events and close relationships with Dior ambassadors and influential personalities.
Nicolas Altmayer
Favier was no longer married when she died.
Her longtime partner was Nicolas Altmayer, a French film producer. The couple were together for years before their deaths in the August 2026 road accident.
Altmayer, 61, was traveling with Favier when their vehicle collided with a heavy goods vehicle in western France. Both died in the crash.
The accident brought an unexpected and tragic end to their relationship, as well as to Favier’s career at one of the world’s most influential luxury brands.
A Private Personal Life
Favier’s professional profile was considerably larger than the amount of information publicly available about her marriages.
At Dior, she became a familiar figure to the fashion industry’s most influential personalities. Her position required her to cultivate relationships with celebrities, designers, journalists and international clients, making her an important part of Dior’s public image.
Yet she rarely turned her own private life into a major public story.
That distinction is important when examining searches about her former husbands. Some online accounts contain additional claims about her marriages that are not supported by detailed reporting from established publications. The clearest publicly reported information identifies Agostinelli and Meyer as former husbands, while Altmayer was her partner at the time of her death.
Her Dior Legacy
Favier’s identity was ultimately defined by more than her relationships.
She joined Dior in 2011 and became one of the fashion house’s leading public-relations figures. Over the years, she helped manage relationships between Dior and major international stars and played a role in maintaining the brand’s image across fashion, entertainment and culture.
She also published Living Beautifully in Paris in 2024, sharing her perspective on Parisian interiors, style and the world surrounding luxury brands.
Following her death, Dior figures paid tribute to her professionalism, personality and contribution to the company.
The Bigger Picture
Mathilde Favier’s relationship history included two marriages, two children and a long-term partnership that continued until her death.
Her former husbands were Robert Agostinelli and Olivier Meyer, while Nicolas Altmayer was the partner who was with her during the final years of her life.
For someone who spent her career helping shape the public image of others, Favier kept much of her own family story comparatively discreet. Today, that privacy means there are still unanswered questions about parts of her personal history.
