Smiling girl with leukaemia pictured laughing on Princess Diana's knee in iconic image loses battle with disease at 21 after being inspired by royal to devote her life to others

She was the young cancer sufferer pictured sitting on the knee of Diana, Princess of Wales, at the royal's final official engagement before her tragic death.

Hollie Robinson Marsh beat cancer as a child but has now sadly passed away after the leukaemia returned, 17 years after the photo was taken.

The girl was just four when she met the Princess at north London's Northwick Park Hospital children's ward in July 1997.