Both Meghan and Kate have adopted one of Jackie Kennedy's most enduring style legacies, still beloved by well dressed women over six decades later.
Meghan Markle's sister has seen a Twitter account suspended for a rule violation even as she mounts a libel lawsuit against the duchess.
Newsweek's "The Royal Report" podcast discusses royal etiquette, from how to address the Queen to what to do if you want to take a royal selfie.
Kate Middleton has inherited some of Diana's most precious jewelry but it's how she wears it that is the real tribute to the late princess.
Harry's tense relationship with his father mirrors the distance between Charles and Diana in the 1990s, according to a friend of the princess.
Kate Middleton appeared in an electric blue coat dress at a service dedicated to the commonwealth at Westminster Abbey alongside Prince William.
One of Samantha Markle's accounts now shows a message stating: "Twitter suspends accounts which violate the Twitter Rules."
"She's a very old lady and leaving home and walking around, up aisles in cathedrals and abbeys, is very difficult for her," said author Penny Junor.
Queen Elizabeth II, 95, has renewed a commitment made aged 21 to dedicate her whole life to public service.