About C. Z. Guest
Lucy Douglas "C.Z." Guest was an American actress, author, columnist, horsewoman, fashion designer, and socialite who achieved a degree of fame as a fashion icon. She was frequently seen wearing elegant designs by designers like Mainbocher. Her unfussy, clean-cut style was seen as typically American, and she was named to the International Best Dressed Hall of Fame List in 1959.
Biography source:
Wikipedia