Charlotte Casiraghi celebrates 40th birthday with fashion highlights and new book

Charlotte Casiraghi, daughter of Princess Caroline of Monaco and granddaughter of Grace Kelly, turned 40 on August 3. The milestone coincides with a surge in her public profile: she has become a regular presence at Monaco’s official events, supporting Prince Albert and attending the National Day celebrations.

She is in a relationship with novelist Nicolas Mathieu and has two children, Raphaël (12) and Balthazar (7). In early 2026 she published her first solo book, *La Fêlure*, following earlier collaborative works on philosophy. Casiraghi also continues her role as a Chanel ambassador, frequently appearing at the brand’s haute‑couture and ready‑to‑wear shows, and her style has been highlighted in a roundup of 40 notable looks ranging from tweed ensembles to modern oversized silhouettes.

Beyond fashion, she holds a philosophy degree from the Sorbonne, founded the Rencontres Philosophiques de Monaco, and remains active in cultural circles, reinforcing the legacy of her grandmother while shaping her own path.