Princess Charlene applauds during the celebration of the 10th anniversary of Prince Albert II's
accession to the throne, Saturday, July 11, 2015, in Monaco. On 31 March 2005, the Palace of Monaco announced that Hereditary Prince Albert would take over the duties of his father as regent since Rainier was no longer able to exercise his functions as sovereign. On 6 April 2005, Prince Rainier III died and Hereditary Prince Albert became Albert II, Sovereign Prince of Monaco. REUTERS/Lionel Cironneau/Pool