Prince Harry and Meghan Markle could become "very unhappy" and "insignificant", a royal author has warned.
Tom Quinn, who wrote the newly-released book Gilded Youth, has drawn similarities between the Duke and Duchess of Sussex and former King Edward VIII and his wife Wallis Simpson.
According to the expert, after sharing their experiences through interviews, books and documentaries, Harry and Meghan will not have much else to say - and the public will no longer be interested.