Sharon Stone has lost custody of one of her three sons.

The "Basic Instinct" star lost physical custody of her 8-year-old son Roan, "Entertainment Tonight" first reported.

In the Sept. 12 custody hearing, Stone's ex Phil Bronstein "shall have permanent sole physical custody of child. Court finds that [Sharon Stone] failed to meet her burden of proof and denies [Sharon Stone's] request for modification of custody. The judge also notes this order is permanent unless there is a change of circumstances," according to the court minute order.

Previously in 2007, Stone, 50, and the San Francisco newspaper editor, 57, had shared joint custody.

The boy is now living with his father.

"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."

The couple had wed on Valentine's Day in 1998. During their marriage, they adopted son Roan Joseph Bronstein. After her divorce in 2004, she adopted two other sons: Laird and Quinn.