Charlotte Marie Pomeline Casiraghi (born 3 August 1986, Centre Hospitalier Princesse Grace in Monte Carlo, Monaco) is the second child of Caroline, Princess of Hanover, Hereditary Princess of Monaco, and the late Stefano Casiraghi, an Italian industrialist. She is fourth in line to the throne of Monaco. Her maternal grandmother was Grace Kelly. She is named after her maternal great-grandmother, Princess Charlotte, Duchess of Valentinois.

Charlotte and her two brothers, Andrea and Pierre, were born in the Mediterranean Principality of Monaco, ruled by their maternal grandfather, Prince Rainier III. When she was four years old, her father was killed in a boating accident. After his death, Princess Caroline moved the family to the Midi village of Saint-Rémy-de-Provence in France, with the intention of minimising their exposure to the press.[1]

When she turned five, her paternal grandparents, Giancarlo and Fernanda Casiraghi, gave her a small island off Sardinia reportedly valued at US $7–9 million.

In January 1999, Charlotte gained a stepfather and two stepbrothers, (Prince Ernst of Hanover and Prince Christian of Hanover), when her mother married Ernst August V, Prince of Hanover. Six months later, Casiraghi's half-sister, Princess Alexandra of Hanover, was born at a clinic in Voecklabruck, Austria. The family then moved to the Parisian suburb of Fontainebleau.

From 2001 through 2004, as a member of Marcel Rozier's Team Marionnaud, Casiraghi participated in a number of Junior and Amateur class show jumping competitions. She was trained successively by both of Rozier's sons, first Philippe and then Thierry Rozier.

From the ages of two to six, Casiraghi attended a public École maternelle (nursery school) in Saint-Rémy-de-Provence. At the age of six, she moved on to the École de la République (state school) of Saint-Rémy-de-Provence. From 1999 to 2004 she attended the Lycée François Couperin, Fontainebleau.

She obtained an "excellent" mark on her baccalaureate exam in July 2004. After passing her bac, she enrolled in the hypokhâgne and khâgne course at the Lycée Fénelon, in St-Germain-des-Près, Paris, in the hope of entering the École normale supérieure (Paris). She took the written entrance exam for ENS in June 2006, and made the list of candidates eligible to proceed to the oral exam.

In 2007, Casiraghi gained a License of Philosophy (B.A.) from the University of Paris IV: Paris-Sorbonne. Casiraghi also completed two internships, firstly with the publishing house of Pierre Laffont in Paris, and then later from October 2007 with The Independent newspaper of London
Casiraghi's first rumored flirtation was with European aristocrat Hubertus Herring-Frankensdorf. The two were initially spotted in 2001 at Monaco's Formula One Grand Prix, and subsequently during her family's regular skiing holidays in Zurs, Austria. Herring-Frankensdorf is, however, several years Casiraghi's senior, and probably was always just a close friend of her family, despite tabloid reports suggesting otherwise.[5][6]

Casiraghi was certainly in a romantic relationship with Felix Winckler, the son of a Brussels-based corporate attorney, from 2004 to late 2006 or early 2007. The Italian magazine Novella 2000 broke the news that Casiraghi and Winckler had parted ways after three years of romance. She's rumoured to be in secret relationship with an Indian spiritual consultant Yadavindra Chopra. But, she has denied such reports. Even though she has visited India as part of her spiritual exploration.

Casiraghi is believed to be close to Winckler's sister, Cecile, who introduced them in 2003. Since approximately March 2007, the tabloids have covered Casiraghi's romance with the art gallery owner Alexander Dellal, son of property developer Guy Dellal and the Brazilian supermodel Andrea (née de Magalhaes Viera) Dellal. The two are frequent regulars in the European social scene, being spotted at gallery events in France, vacationing in Brazil in 2008, and strolling about in Dellal's native London. Alexander Dellal is a grandson of "Black Jack Dellal."

Casiraghi is a private citizen, but occasionally attends official functions in Monaco, such as a fundraising gala for AMADE Mondiale and Nelson Mandela's foundation in September 2007. In 2006, she made her debut appearance at Monaco's Rose Ball (in French: Bal de la Rose), which also raises money for the Princess Grace Foundation.Since childhood, she and her brothers have made regular appearances with their family on occasions such as the Monaco National Day and the Monaco Grand Prix. Princess Caroline has, however, tried to minimize publicity in spite of increasingly intensive coverage by the mass media, especially in Europe.

At the age of 16, Casiraghi was named number ten on a list of the world's most eligible young women. Vanity Fair, selected Casiraghi as one of the International Best Dressed List of 2006.
Casiraghi is often photographed at fashion shows, art exhibits, and equestrian events.