The Duke of Cambridge and his two eldest children kicked off an inaugural running event on Father's Day at the Queen's Sandringham Estate in Norfolk.
Prince William, who was celebrating his 39th birthday, surprised runners as he took to the stage alongside Prince George, seven, and Princess Charlotte, six, to start the half-marathon.
Race director Aaron Murrell said the runners 'really enjoyed' seeing them, adding: 'There was a fantastic atmosphere within the event village as they joined us on stage to start the half-marathon event.'
Some 1,300 runners took part in Run Sandringham, which included a half-marathon, a 5K and a community mile, raising 'many thousands of pounds for good causes'. Beneficiaries included the East Anglian Air Ambulance, Break and East Anglia's Children's Hospices, as well as causes chosen by participants.
It is understood the duke was not running and was there in a private capacity.
