One of her legs was shorter than the other.
Given her perfect posture and poise, you’d never guess that there was something off about Jackie O’s gait. However, in her book Jackie’s Girl: My Life with the Kennedy Family, the former first lady’s personal assistant Kathy McKeon revealed that she had significantly uneven legs.
There was “a quarter-inch lift affixed to one heel on each pair of Madam’s shoes, apparently meant to compensate for one leg being slightly shorter than the other,” McKeon writes. “No one would have ever guessed: Even in her stocking feet, she had flawlessly beautiful posture.”