Royal fans were taken by surprise when Prince George and Princess Charlotte made an appearance at Prince Philip's memorial service.
It was known well in advance that their parents the Duke and Duchess of Cambridge would be attending - but there had been no word their two oldest children would be there until just before the event.
It is the most high-profile royal event by far that the two youngsters have attended with William and Kate keen to give them and younger brother Prince Louis as normal an upbringing as possible.