The American Actress Grace Kelly became Princess Grace of Monaco when she married Prince Rainier III of Monaco on April 18, 1956 in the Palace throne room of Monaco. She and Rainier had 3 children:
- Caroline Louise Marguerite, Princess of Hanover, born January 23, 1957, and now heiress presumptive to the throne of Monaco
- Albert II, Prince of Monaco, born March 14, 1958, current ruler of the Principality of Monaco
- Princess Stéphanie Marie Elisabeth, born February 1, 1965.