Prince Harry tugs at his mother's arm as she jokingly pulls away from him, into the arms of a delighted William. It's a snapshot of a contented Diana, Princess of Wales, relaxed and happy.
The photograph by John Swannell, one-time assistant to David Bailey and now a leading portrait and fashion photographer, is part of a group of images about to go on display at London's National Portrait Gallery to mark the 10th anniversary of Diana's death in Paris. It looks at her life in the public eye as a wife, mother, charity worker and fashion figure.
A decade after her death dominated the news for weeks, amid public outpourings of grief - both in Britain and abroad - the exhibition, titled Diana, Princess of Wales, is likely to attract interest from far and wide.
It opens on July 14 and draws on the gallery's collection of more than 40 images of Diana, some of which have never been publicly displayed.
Paul Moorhouse, curator of 20th-century art at the gallery, is responsible for the show. He says the works cover the period from 1981 to 1997 - from her marriage to Prince Charles, aged 20, to her death in a car crash with Dodi Fayed after being chased by paparazzi.
The images were taken by 11 photographers: Lords Snowdon and Lichfield, Carole Cutner, David Bailey, Terence Donovan, Derry Moore, George Grimes, John Swannell, Roger Hargreaves, Jose Manuel Ribeiro and Mario Testino. The Testino photos were the result of her last official shoot.