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 Albert I, Prince of Monaco Albert I (13 November 1848 – 26 June 1922) was Prince of Monaco and Duke of Valentinois from 10 September 1889 until his death. He devoted much of his life to oceanography. Alongside his expeditions, Albert I made reforms on political, economic and social levels, bestowing a constitution on the Principality in 1911. Born Albert Honoré Charles Grimaldi on 13 November 1848 in Paris, France, the son of Prince Charles III (1818–1889), and Countess Antoinette de Mérode-Westerloo (1828–1864), a Belgian noblewoman, maternal aunt of Donna Maria Vittoria dal Pozzo, Princess della Cisterna, Duchess consort of