Sharon Stone is said to have ‘adpoted’ her eldest son’s best friend after his father died and he was left with nothing.
The actress, 64, who lives with her family in a mansion in Beverly Hills, is already a mother to three adopted children.
She reportedly added a fourth to her family in the form of her 22-year-old son Roan’s friend.
"This happened around a year ago and she has kept it pretty quiet," a source told the Daily Mail.
"The kid is inseparable from her son Roan and they all live together as a family now, in her big place.
"It’s great for Roan because they are best friends and she loves to have a big family around her."
The added: "[Sharon] says that he is her ‘adopted son’ — that’s the way she describes him and that’s her commitment, although I am not sure whether steps have been taken to formalise it legally yet."
The Basic Instinct star is said to have spoken about the situation during a recent appearance at a film festival.
According to the Daily Mail, she said: "My oldest boy’s very best friend, from when he was little, had a single parent who had Parkinson’s and who he took care of for 12 years, until his father died during Covid.
"And so he was suddenly alone... and I took him in. So now I have four boys."
Stone adopted her eldest son Roan in 2000, during her marriage to Phil Bronstein, after suffering a number of miscarriages.
She adopted her second son Laird in 2005 and a third boy named Quinn in 2006.