Andrea Albert Pierre Casiraghi, is the elder son of Caroline, Princess of Hanover, and her second husband Stefano Casiraghi, and is the eldest grandchild of Rainier III, Prince of Monaco, and the American actress and dancer Grace Kelly, who became Princess of Monaco after marrying Prince Rainier III, in April 1956.
 He is the eldest grandchild of Rainier III, Prince of Monaco, and American actress Grace Kelly. 
Grace Patricia Kelly (November 12, 1929September 14, 1982) was an American actress who became Princess of Monaco after marrying Prince Rainier III, in April 1956. 
