The Queen's official 90th birthday is being marked at the Trooping the Colour parade in central London.
Dressed in a bright lime green coat and matching hat with pink flower, the Queen waved to crowds as she left Buckingham Palace in a horse-drawn carriage, accompanied by the Duke of Edinburgh.
Queen will be guest of honour at a huge street party on Sunday as three days of celebrations to mark her 90th come to a spectacular close.
At 13 months old, Charlotte is almost the same age as the Queen was when she first appeared on Buckingham Palace's balcony 89 years ago.
The Queen's official birthday is set to be marked today by a Trooping the Colour parade held in her honour.