The Duke of Cambridge and Prince Harry have followed in their mother's footsteps by voicing their support for one of the UK's leading HIV charities.
Princes William and Harry sent a letter congratulating the Terrence Higgins Trust on its 30th anniversary and praised the charity's work in supporting people with the virus.
The royal brothers called on a generation to "pick up the sword and continue the fight" against HIV, saying many sufferers are still blighted by a stigma often attached to the illness.
It follows the late Diana Princess of Wales' close association with charities and organisations that tackled HIV.
William and Harry hailed the Terrence Higgins Trust as "a fantastic source of advice and support" on HIV-related matters.
"Our generation must pick up the sword and continue the fight. There is still no cure or vaccine. However, we know it is possible to prevent HIV from spreading further in the future", they added.