Kitty Spencer, 25, is backing the the UK's leading charity for homeless young people, Centrepoint, which her late aunt Princess Diana supported and was also supported by her cousin Prince William, who is the organization's royal patron.
Kitty, the eldest child of Diana's younger brother, Charles Spencer, 51, and his first wife Victoria, has become an ambassador for the charity, which will help them "bring more attention to the issue of youth homelessness," a spokesman tells PEOPLE.
Last week, Kitty quietly visited two of the charity's bases, including one that her cousin has visited. During the visit she checked on a project also backed by Sport Relief.
Youth homelessness affects around 83,000 people each year in the U.K., Centrepoint says.
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"The idea is to use sport to motivate young people staying in our hostels and build their confidence. They are then more likely to take opportunities such as work experience or job opportunities," the Centrepoint spokesman tells PEOPLE.
And Kitty Spencer was impressed. She captioned a photo on Instagram: "What a fascinating morning seeing all the wonderful work that Centrepoint does to help homeless young people in the UK. I loved my visit to Bruce House Hostel & the Dean Street Health & Wellness Centre."
In his last public move for the charity, William gave a pre-Christmas interview with Big Issue magazine, and spoke about his commitment to the cause and recalled visits to hostels he made with his mother.
"I think it goes back to when my mother first took the role when I was a small boy. I was very struck by the people I met and what they were struggling with – sleeping rough, sofa surfing, not having basic comforts a lot of us take for granted," he said.
"That really struck me at a young age, bearing in mind the gulf for me growing up in a palace and seeing the other end of the spectrum," he continued. "That was powerful to see at a young age. In today's Western world, with all the advancements and privileges we have, the fact some people don't have a bed or a roof over their head is quite ridiculous."