Princes William and Harry paid a quiet tribute to their mother Princess Diana on Wednesday, a day before the 20th anniversary of her death that has reignited interest in one of the world's most famous women.

Diana's two sons met representatives of the charities she supported in a public garden at Kensington Palace, their home and where their mother lived until she was killed in a car crash in Paris on Aug. 31, 1997.

Outside the palace gates supporters of the royal family gathered in the rain to mark the occasion, with many praising Diana's sons for keeping her in the public memory.