Chantecaille is a social fixture and, along with her mother, the owner of a cosmetics company that bears the family name.

Olivia's mother is Sylvie Chantecaille, a former Estée Lauder beauty expert who was creative director of the company's Prescriptives line. Raised in New York, Olivia studied art history at NYU and in 1997 she joined forces with her mom to start a line of cosmetics, Chantecaille Beauté. Now the company's creative director, she and her mother produce a host of products—foundations, perfumes, lotions—and also operate the Chantecaille salon/spa in Barneys. Tall and dangerously thin, Olivia is also a social staple and makes regular appearances at events around town.

Chantecaille was the longtime girlfriend of furniture heir Eric Villency, but the two broke up in 2005, a few months after Page Six published an email suggesting that their very public relationship was just a scheme to generate publicity for their respective companies. She's since married Ren Grady, a banker. [Image via Getty]