Dame Barbara Mary Quant was a British fashion designer and icon. She became an instrumental figure in the 1960s London-based Mod and youth fashion movements, and played a prominent role in London's Swinging Sixties culture. She was one of the designers who took credit for the miniskirt and hotpants. Ernestine Carter wrote: "It is given to a fortunate few to be born at the right time, in the right place, with the right talents. In recent fashion there are three: Chanel, Dior, and Mary Quant."

A fashion icon or fashion leader is a influential person who introduces new styles which spread throughout fashion culture and become part of fashion. They initiate a new style which others may follow. They may be famous personalities such as political leaders, celebrities, or sports personalities. For example, during the 1960s, Jackie Kennedy was a great fashion icon for American women, and her style became a sign of wealth, power, and distinction; and her famous Pink Chanel suit is one of the most referenced and revisited of all of her items of clothing. Twiggy was an It girl, she was a teenaged model and fashion icon of Swinging Sixties.