Prince Rainier III of Monaco and US actress and Princess of Monaco Grace Kelly are seen during their wedding ceremony in Monaco's Saint Nicholas Cathedral on April 19, 1956. (Photo credit should read STF/AFP/Getty Images)
Prince Rainier III of Monaco and US actress and Princess of Monaco Grace Kelly are seen during their wedding ceremony in Monaco's Saint Nicholas Cathedral on April 19, 1956. (Photo credit should read STF/AFP/Getty Images)