From zimbio.com and dailymail.co.uk:
Members of the British Royal Family attended the Trooping the Colour Parade today to celebrate Queen Elizabeth II’s official Birthday
The Queen and Duke of Edinburgh arrived in an Ascot Landau carriage after the short drive down The Mall from Buckingham Palace
The Prince of Wales, who is Colonel of the Welsh Guards, the Princess Royal, who is Colonel of the Blues and Royals, and the Duke of Cambridge, Colonel of the Irish Guards, were all on horseback for the ceremony.
(L-R) Prince Harry, Camilla, Duchess of Cornwall and Catherine, Duchess of Cambridge
Full Article(s) and More Pictures on dailymail.co.uk and zimbio.com:
Queen Elizabeth II’s Birthday Parade: Trooping The Colour – Pictures – Zimbio
Happy Birthday Ma’am! British pomp and ceremony at its best as the Royal Family turn out in fine style for the traditional Trooping the Colour parade saluting the Queen turning 88 | Mail Online
