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
Albert I, Prince of Monaco a special provision was made by the Vatican to allow Louis to remain legitimate in the eyes of the Church. Civilly, the marriage was dissolved on 28 July 1880 by the Order of Prince Charles III. That same year, the former Princess of Monaco remarried in Florence, Italy, to a Hungarian nobleman, Prince Tassilo Festetics von Tolna. On 10 September 1889, Albert ascended the throne of Monaco on the death of his father. That same year in Paris, on 30 October, he married the Dowager Duchess de Richelieu, née Marie Alice Heine (1858–1925). The American daughter of a New Orleans