The singer struck up a friendship with the Princess in the 1990s before her shocking death in a car crash in Paris, France in 1997, and he met up with her eldest son during a trip to Britain for his appearance at Glastonbury Festival last weekend (27-28Jun15).

Richie reveals he was overwhelmed to see Prince William again after so many years, and he became emotional as he spoke to him about his late mother.

The star tells Britain's The Sun newspaper, "Prince William, I met him the other day and we hung out together. His mother and I were very good friends. I was congratulating him on basically growing up and becoming a fine young man. I said to him that I'm sure his mother would have been so proud of him, as I'm sure his father and the rest of his family are.

"I couldn't help but have tears in my eyes when I saw him because I just knew how proud his mother would be."