"Extra" has obtained papers showing that Sharon Stone wants to modify her current custody deal with ex Phil Bronstein, who has primary physical custody of their 8-year-old son, Roan.

Phil, 57, and Sharon, 50, married in 1998 and split in 2004. Sharon has two other sons; Laird, 3, whom she adopted in 2005, and Quinn, 2, adopted in 2006.

Click here to see the papers.