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 heiress 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 defunct throne of the former Kingdom of Hanover, as well as the heir male of George III of the United Kingdom.