When asked about the Duchess becoming a member of the monarchy late in life, O'Grady, speaking during a Clarence House birthday garden party on Thursday, replied: "It's taken a lot of guts, you know, it really has".
The Duke and Duchess of Cambridge and Prince Harry were among guests at a glamorous shindig thrown by Prince Charles at Highgrove, in Glouc.
Camilla has just reached the average age of the people the charity helps and has reason to be thankful - as she was this weekend surrounded by friends at her birthday bash.
The Duchess of Cornwall's former husband, Andrew Parker Bowles, was also there. Despite his many affairs during their failed first marriage, the two remain good friends.
A series of relaxed portraits of the late Diana, Princess of Wales - taken just months before she died in 1997 - became some of his best-known portraits.More news: Now United Airlines Is Even Losing Dogs On Flights
Well, the most likely scenario will be that Camilla takes the title of "Princess consort" rather than "Queen".
When a queen marries, her husband doesn't automatically become "King", unless he's already a king in his own right - hence why Queen Elizabeth's husband isn't "King" Philip.
CAMILLA was a picture of youth in this 70th birthday picture by Princess Diana's favourite snapper.
Prince Charles and Camilla were officially photographed in public for the first time in 1999 after a party at The Ritz hotel.
Milestone: Prince Charles and the Duchess of Cornwall photographed at their official London residence, Clarence House, earlier this year.
Prince Charles with author Kathy Lette at a reception for Camilla's 70th birthday.