Cecil Beaton wrote in his diaries that Jackie Kennedy was underwhelmed by Buckingham Palace as well as Queen Elizabeth's gown Stephanie Petit is a Royals Editor, Writer and Reporter at PEOPLE.

Below, Jackie Kennedy's style evolution in photos ... In one of her more famous encounters, Jackie stands next to Queen ...

Jackie Kennedy's Secret Service Agent Announces ... And when he dropped her off for a Buckingham Palace lunch with Queen Elizabeth in 1962, he also saw her as a young mom who could share stories ...

What’s a horse girl, you might ask? The name connotes the youthful, powerful athleticism of Jackie Kennedy, the OG horse girl ...