Kate's dress was by one of her favourite designers, Alexander McQueen and she accessorised it with a bright pink Jane Taylor hat and diamond teardrop earrings.
The Queen and Prince Philip with Camilla, Duchess of Cornwall and Prince Charles. According to the Telegraph, George had initially seemed restless as the group gathered for photographs, but once the flyby began he was "bouncing on his toes as he waited for the next plane to arrive".
The head of state said a saddened country was showing resolve in the face of adversity and a determination to rebuild lives wrecked by "terrible" tragedy.
While this is a joyous occasion for Londoners, the Queen's annual birthday message to her people reminded them, and the rest of the world, that the hardships her country has faced have not been forgotten.
The Queen, 91, visited the site of the Greenfell Tower fire in north Kensinton with her grandson, Prince William, on Friday and paid a visit to the Westway Community Centre, where many residents are now seeking shelter following the blaze.
AN OXFORDSHIRE man has helped lead the Queen's official birthday celebrations today as he headed up the parade during the Trooping the Colour ceremony.
Pollsters project Macron alliance winning big majority
The pollsters project that Macron's candidates and their allies won as many as 360 seats in the 577-seat chamber. The response, in a word, is heartening. "Even if we don't know the new faces, it's not important".
However, both the royal children handled themselves like seasoned pros, waving to the crowds from the balcony and staring up in awe as the Royal Air Force flew overhead.
The Trooping the Colour, a large parade of soldiers through central London, marks the Queen's official 91st birthday.
"As a nation, we continue to reflect and pray for all those who have been directly affected by these events".
Trooping the Colour dates back to 1748 started by King George II, whose birthday was in November.
The Queen's actual birthday is April 21, but traditionally British monarchs have an official birthday in the summer months when there is a better chance of good weather for birthday events.