Caroline, Princess of Hanover Caroline, Princess of Hanover Caroline, Princess of Hanover (Caroline Louise Marguerite Grimaldi; born 23 January 1957), is the eldest child of Rainier III, Prince of Monaco, and the American actress Grace Kelly. She is the elder sister of Prince Albert II and Princess Stéphanie. Until the births of her niece and nephew, Princess Gabriella and Prince Jacques, in December 2014 she had been heir presumptive to the throne of Monaco since 2005, a position which she previously held from 1957 to 1958. Caroline is married to Ernst August, Prince of Hanover (born 1954), the heir to the former throne of
Jacques I, Prince of Monaco de Bourbon-Maine, a grand daughter of Louis XIV and his mistress, Madame de Montespan, was proposed as a wife for the widowed prince; despite having a large dowry, (she was the daughter of the Louis-Auguste de Bourbon, duc du Maine and his wife, Anne Louise Bénédicte de Bourbon) the marriage never materialised and the prince never married again. His Paris residence was named after him Hôtel Matignon and is today the official residence of the Prime Minister of France. Prior to his death, he was a frequent visitor to Versailles with his son. Jacques I, Prince of Monaco Jacques Goÿon