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
Antonio I, Prince of Monaco to King Louis XIV of France in the Parlement on account of being Duke of Valentinois and a Peer of France. He was made a knight of the French royal orders in 1724. Antonio married 13 June 1688 Marie de Lorraine, ""Mademoiselle d'Armagnac"" (12 August 1674 – 30 October 1724), daughter of Louis of Lorraine, Count Armagnac. They had six daughters of whom only three survived infancy : Antonio also had a number of illegitimate children: Schwennicke, Detlev (Ed.) "Europäische Stammtafeln", J.A. Stargardt Verlag, Marburg, volume II, table 201. Antonio I, Prince of Monaco Antonio I (25 January 1661 –