Queen Elizabeth II's official birthday is celebrated with traditional ceremonies trooping the Colours. All 7 regiments of guards march to a massed band of 300 in a glittering tribute to her majesty. MLS - Queen Elizabeth II on horse back and just in back of her is Prince Philip, Duke of Edinburgh. MCUS - Queen Elizabeth II saluting the Grenadier Guards while sitting on horseback. MCUS - All seven regiments of the household brigade is represented. MLS - Queen Mum on a balcony overlooking the Trouping The Colours with a young Prince Charles and Princess Ann. Queen Mary is in the background. MCUS - Queen Elizabeth II and the Duke of Edinburgh (Prince Philip) sitting on their steeds enjoying the tribute to her majesty on her 21st birthday. OHS-L - The ancient square below house a thousand guards men in a glittering finale.