Video report by ITV News' Royal Editor Tim Ewart:
Rain soaked revellers have celebrated the Queen's 90th birthday with a street party on the Mall for 10,000 well-wishers.
The Duke of Cambridge thanked the guests for not letting "a little rain spoil a good day out" and praised his "granny" as someone "we all look up to in good times and in challenging moments to set an example".
The Patron's Lunch was a fitting end to three days of events to mark the Queen's official 90th birthday.
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.