CHARLES & CAMILLA: The Secret TO OUR HAPPY MARRIAGE

For the first time in years, Duchess Camilla opens up about her 52-year love story with Prince Charles

As she approaches her 75th birthday on July 17, Duchess Camilla has stopped caring what anyone thinks. "I think you can't do much more about yourself," the senior royal reveals in a rare new interview. "You've done what you can. I think you just accept that you are who you are."

These days, the only person whose opinion really matters is her husband, Prince Charles. "He has always loved her unconditionally," a source says of the future king, who fell for Camilla when they first met at a polo match in 1970. And now - after famously marrying and divorcing others before finally tying the knot in 2005 - Camilla is opening up about her secret to their happy union, five decades later. "Their relationship is stronger than ever," says the source. "After all the scandal and adversity they faced, she got a fairy-tale ending with her prince."