"Diana and I had been talking about doing Bodyguard 2 and I told her I would take care of her just the same way that I took care of Whitney (Houston). She wanted me to write it for her. I said, 'I'll tailor it for you if you're interested.' She goes, 'I am interested'." Kevin Costner confirms he was working on a sequel to The Bodyguard with British royal Diana, Princess of Wales before she died in 1997.