The Duke of Sussex, 39, delighted sick kids with his appearance at the WellChild Awards, a charity of which he has been a patron since 2007.
Earlier in the day, the dad-of-two broke cover on the way to the event as he was seen leaving Frogmore Cottage where he has been self-isolating since touching down in the UK from the US.
The WellChild event celebrates inspirational youngsters living with serious illnesses, a charity which is close to Harry’s heart.
It’s understood organisers brought the date forward to ensure Harry would be able to come as he’s in the UK for Dianastatue’s unveiling in the Sunken Gardens at Kensington Palace on Thursday.
They hope the statue will immortalise their mother and her legacy as the people’s princess.
In 2020, a joint statement from Kensington Palace read: “The princes hope the statue will help all those who visit Kensington Palace to reflect on their mother’s life and legacy.”
The brothers revealed they had commissioned a statue in 2017 to mark the 20th anniversary of their mother’s death.
Harry and William said the statue would recognise their mother’s positive impact in the UK.
“It has been 20 years since our mother’s death and the time is right to recognise her positive impact in the UK and around the world with a permanent statue.”
The Sunken Garden of Kensington Palace was reportedly chosen because it was one of Diana’s favourite places.
Diana spent much of her time in the green space surrounding the palace where she lived for more than 15 years. She loved flowers, especially forget-me-nots, white lilies, white roses, tulips, narcissi, and Cosmo daisies.
“She would stop by and talk to the gardeners when she was living here,” Sean Harkin, head gardener at Kensington Palace, told Vogue.