For yet unclear reasons, actress Sharon Stone has lost joint custody of her oldest son, 8-year-old Roan. Stone adopted Roan with then-husband Phil Bronstein, who now has sole custody of their son.

Some would call the news shocking, as nothing has been brought to the public's attention about Stone's parenting, but according to a court order obtained by Entertainment Tonight, Stone's ex-husband Phil Bronstein "shall have permanent sole physical custody of child. Court finds that respondent [Sharon Stone] failed to meet her burden of proof and denies respondent's [Sharon Stone's] request for modification of custody."

The order detailing a September 12, 2008 custody hearing was made permanent unless there is a change of circumstances, such as one of the parents decide to relocate.

Stone and Bronstein, who got divorced in 2004 agreed to "joint legal and physical custody" of 8-year-old Roan, who was adopted by the couple a week after he was born on May 22, 2000, in Texas.

Earlier this year, Stone filed court papers seeking a change in the boy's primary residence, ostensibly either as a preliminary step to seek joint living arrangements or possibly increased custody. At the time, Bronstein, who left his job as executive vice president and editor of the San Francisco Chronicle for a position with Hearst Newspapers, retained primary custody of their son, as he now will continue to do.

"The court does not find that (a) move away is in child's best interest," say the minutes. "(Bronstein) can provide a more structured continuity, stable, secure, and consistent home that child, Roan, needs." Roan currently lives with his father in the Bay Area, where he attends school.

The 50-year-old actress "shall have access to child," the minutes say, and her phone number "shall be programmed into the child's telephone and home phone."

Stone and Bronstein, who tied the knot on Valentine's Day in 1998, announced they were splitting in 2003. Stone has two more adopted sons: Laird Vonne Stone, born May 7, 2005, and Quinn Kelly Stone, born in June 2006.

In April 2007, Stone told People that the most surprising thing about being a mom to three children is "that I can actually accomplish it all every day. And get them all under blankets every night."