Prince William honored his late mother, Princess Diana, today, on the 25th anniversary of the Diana Award, giving a touching speech about her legacy.

The Diana Legacy Awards, held today at the Science Museum in London, honored young leaders from all over the world who guide and inspire their communities, just as Diana, who died in 1997, did. At the ceremony, the Prince of Wales met key staff and supporters of the Diana Award before getting up to say a few words and present Legacy Awards to this year’s winners.