Monaco’s Charlotte Casiraghi makes public debut with new boyfriend Nicolas Mathieu

It’s now official between Monaco’s Charlotte Casiraghi and French novelist Nicolas Mathieu, as the pair made their public debut as a couple on Friday.

The new couple were seen in the crowd at the Monte Carlo Country Club Roquebrune-Cap-Martin, watching the match between Italian Jannik Sinner and Czech Tomas Machac. Charlotte was seen wearing a sleek black outfit and jeans, while her new beau wore a white shirt, denim jeans and a tan jacket.

The Monaco royal and French crime writer weren’t alone, as they were also joined in the stands by Nicolas’ 13-year-old son, in what was reportedly his first time in the principality.

The couple were first linked in 2024 when French publication Paris Match posted pictures of the couple sitting together on the terrace of Parisian restaurant, À la Ville d’Epinal, which is located in one of the city’s most artistic neighbourhoods.

Charlotte’s previous relationship

Charlotte, who is the granddaughter of Monaco’s Prince Rainier and Hollywood actress Grace Kelly, was previously married to French film producer Dimitri Rassam. The pair married in June 2019, with a civil ceremony taking place in Prince’s Palace of Monaco’s Throne Room and later a religious celebration in Provence, France.

For the civil ceremony, Charlotte wore a brocade mini dress by Saint Laurent, complete with three dramatic bows down the front and a scalloped edge. She also wore her late grandmother’s diamond necklace – a wedding gift from Prince Rainer when they married in 1956.

Charlotte and Dimitri welcomed a son, Balthazar, in 2018, just months before they walked down the aisle. The Monaco royal is also mother to son Raphael, who she welcomed with comedian Gad Elmaleh; however, while Balthazar is in the line of succession, Raphael isn’t as his parents never married.

Charlotte and Dimitri split in 2024, and speaking to The Telegraph following her divorce, the royal credited “reading a lot of female writers” with helping her to navigate the heartbreak. She added: “For me, it’s important to be free from certain conventions.”

© Getty

Despite her royal links, Charlotte often tries to keep away from the expectations placed on her. In the same interview, she explained: “But I always try to detach myself from this ‘royal’ status.

“Of course I love to contribute to Monaco, but my philosophy taught me that being on the outside allows more complexity and diversity. For example, sometimes I invite people to speak who I don’t agree with, trying to confront ideas.”