Queen Elizabeth was terribly "worried" about Princess Diana before she split from Prince Charles.
The British monarch was "deeply concerned" for the late princess in the wake of her split from the Prince of Wales, who she later divorced in 1996, according to Diana's close personal friend Harry Herbert.
Speaking in the ITV documentary 'Diana, Our Mother: Her Life and Legacy', Harry said: "The Queen wanted to talk to me about it because she was so worried. She was so, you know, worried about Diana. And the Queen wanted to know how was Diana feeling - and was it as bad as it was. And it was a sad discussion - a sad moment really because that was everything at its worst."
Mr Herbert also recalled the first time he set eyes on Diana, when he was just about to play a shot off the tee at his golf course.
He said: "Just as I was about to play my shot, this vision of beauty appeared, full of laughter and energy. And like everyone who meets her she had a big impact. I'm sure my shot was violently hooked or sliced but we became great friends from that moment."
Meanwhile, it was previously revealed that Prince William used to "push tissues" under the door when his mother Princess Diana was crying.
Andrew Morton, who wrote the 1992 biography 'Diana: Her True Story', revealed: "I think as the sons of the future queen they would want to know more about their mother. Both boys lived through what was going on on a daily basis.
"To the point where William was pushing tissues through the bathroom door when Diana was crying. They knew what was going on at that time. They don't need me to tell them about the unhappiness of their mother and the distance of their father."