A royal author believes that Meghan’s presence in the royal family could have been transformative, as she shared many similarities with Princess Diana. Meghan Markle’s Biggest Opportunity Was Wasted! A royal author, Simon Vigar, opened up on how Princess Diana, Kate Middleton, Queen Camilla and Meghan Markle changed the royal family after marrying into it. He said that Princess Diana is the biggest changemaker. They added that Meghan Markle, who married Prince Harry in 2018, had some similarities with Princess Diana.