Updated: August 19, 2026
Mathilde Favier Husband: Mathilde Favier, the elegant and highly connected public relations director for Dior Couture, lived a life that blended high fashion with genuine warmth. For years, people asked about the man by her side. That man was Nicolas Altmayer, the respected French film producer who became her third husband. Their story was never loud or over-shared. It was steady, private, and full of mutual support until a tragic car accident on August 17, 2026, claimed both their lives near Airvault in western France. She was 57. He was 61.
This post shares what is known about Mathilde Favier husband, their relationship, and the quiet partnership that defined her later years.
Table of Contents
Who Was Nicolas Altmayer?
Nicolas Altmayer stood as one of the reliable forces in modern French cinema. Born in 1965, he co-founded the production company Mandarin Cinéma with his brother Éric in the 1990s. Over decades he helped bring more than 70 films to the screen. His credits include the popular OSS 117 series, Brice de Nice, Young & Beautiful, Frantz, and more recent titles such as Monsieur Aznavour. The company earned multiple César nominations and balanced commercial hits with thoughtful projects.
Altmayer preferred working behind the camera rather than seeking the spotlight. Colleagues often described him as kind, steady, and deeply committed to French storytelling. That same grounded quality made him a natural match for Mathilde Favier, a woman who moved effortlessly through fashion’s most glittering rooms yet valued real connection.
How Mathilde Favier and Nicolas Altmayer Met and Built Their Life Together
They first crossed paths at the Cannes Film Festival. Mathilde later joked that the meeting felt a bit too much like an Emily in Paris scene, so they deliberately took their time. By 2021 she was already referring to him as her fiancé in interviews. They appeared together at film premieres, the Rafael Institute gala, Roland-Garros, and later at Cannes and the Marrakech International Film Festival.
Key milestones in their relationship included:
- Regular public appearances starting around 2021–2022
- A formal Pacs (civil partnership) signed on January 8, 2025, under a separation-of-property regime
- Creating a joint SCI (property company) linked to assets on Avenue Raphaël in Paris’s 16th arrondissement
- Being openly referred to as husband and wife by early 2026, including during Mathilde’s Christie’s sale of personal pieces as she prepared a fresh chapter with him
Mathilde spoke of him with quiet joy, calling him her best friend and lover. After earlier marriages and a period of independence, she said she finally felt settled and peaceful.
Mathilde Favier’s Earlier Marriages and Family
Mathilde’s personal life had earlier chapters. Her first husband was American financier Robert Agostinelli, co-founder of the private-equity firm Rhône Group. They married in Venice and had two children: daughter Héloïse (model and former Made in Chelsea personality) and son Carlo. Her second marriage was to Antoine Meyer. By the time she met Altmayer she had already built a strong, independent life while remaining a devoted mother.
The table below summarizes the key relationships connected to Mathilde Favier:
| Relationship | Name | Details | Children / Notes |
|---|---|---|---|
| First husband | Robert Agostinelli | American financier, Rhône Group co-founder | Héloïse and Carlo Agostinelli |
| Second husband | Antoine Meyer | Businessman | No children together |
| Third husband | Nicolas Altmayer | French film producer, Mandarin Cinéma | Partner from ~2021 until 2026 |
Their Shared World of Culture and Discretion
Together Mathilde and Nicolas moved between fashion weeks, film festivals, and cultural patronage. They supported institutions such as the Opéra-Comique. Mathilde’s 2024 book Mathilde à Paris (published in English as Living Beautifully in Paris) offered glimpses of her taste and friendships, and she later mentioned starting a new chapter with her husband when she sold some of her personal furnishings through Christie’s.
They chose discretion. While Mathilde’s Instagram showed her vibrant daily life and Dior work, the couple rarely posed for staged romance. Their bond showed most clearly in the easy way they appeared at events side by side.
Conclusion
Mathilde Favier husband, Nicolas Altmayer, was far more than a name in a headline. He was a serious producer who helped shape contemporary French cinema and the partner with whom she found lasting happiness in her fifties. Their story reminds us that even people who live in the public eye can keep the most important parts of life private and genuine. The fashion and film worlds lost two generous, talented people on the same day in August 2026. What remains is the memory of a stylish woman who loved her work, her children, her city, and the quiet strength of the man who stood beside her.