Members of the Royal Family greeted revellers lining The Mall ahead of a parade to mark the Queen's 90th birthday.
The weather did not dampened people's spirits as the Duke and Duchess of Cambridge spoke with well wishers thronged behind barricades.
Prince Harry, the Earl and Countess of Wessex, and the Queen's grandson Peter Philips also shook hands with crowds standing in plastic ponchos along The Mall.
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.