Cornelia Guest selling Old Westbury estate for $20 million

Heiress, actress and socialite Cornelia Guest has put her 15-acre Old Westbury estate on the market for $20 million. Public records show that the property includes a two-story brick Colonial home built in 1924, with 9 ½ baths and 5 fireplaces. The grounds include a pool, tennis courts, and a greenhouse. The home is listed with Wendy Grant of Daniel Gale Sotheby’s International Realty.

Guest is the daugther of the legendary garden writer, equestrian and society doyenne, C.Z. Guest, who died in 2003. The family moved to Old Westbury in 1968, after selling 150 acres in Brookville that is now the De Seversky Center of the New York Institute of Technology.

Guest became famous in the 1980s as the blueblooded beauty who was dubbed “debutante of the decade” by Andy Warhol, once dated Sylvester Stallone, and was a regular at Studio 54, along with friends-relatives, Richard and Robert DuPont. She is also related to Winston Churchill, who was her father’s cousin.

These days, Guest has become better known for her philanthropic and fund-raising efforts in support of causes like the Humane Society of New York.