Stone married television producer Michael Greenburg in 1984 on the set of The Vegas Strip War
, a TV movie he produced and she starred in. The couple separated three years later, and their divorce was finalized in 1990.
On February 14, 1998, Stone married Phil Bronstein
, executive editor of the San Francisco Examiner
and later San Francisco Chronicle
. Stone and Bronstein were divorced in January 2004. They have an adopted
son named Roan Joseph Bronstein, born on May 22, 2000. Stone adopted her second son, Laird Vonne Stone on May 7, 2005. On June 28, 2006, Stone adopted her third son, Quinn Kelly Stone.
In 2005, during a television interview for her movie Basic Instinct 2
, Stone hinted an interest in bisexuality
, stating "Middle age is an open-minded period".