The doting mom adopted the 23-year-old in 2000 with her then-husband Phil Bronstein ... to which Roan promised: "That's the plan." MORE: Sharon Stone sued for $35,000 over car crash that caused ...

Captioning the snap, Sharon penned: "ROAN JOSEPH STONE. DAY 1 on set ... whom Sharon adopted in 2000 with her then-husband Phil Bronstein – she is also mom to sons Lair, 18, and Quinn, 17 ...

Stone is a mother of three and adopted her first son Roan, 23, in 2000 with her then-husband Phil Bronstein, 73, whom she divorced in 2004. In 2005, she adopted her second son, Laird, 18 ...