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 ...

Kennedy and Jackie Kennedy were married for ... Ted Kennedy claimed in Sarah Bradford's 2000 book, America's Queen. Jackie reportedly had a more realistic view of the situation.

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