Robin Wright and her husband, Sean Penn, are calling it quits on their more than decade-long marriage. People magazine reports that Wright filed for divorce from Penn Aug. 12 in Marin County, Calif. The magazine says Wright and Penn, who have had a tumultuous relationship, have agreed to share custody of their 16-year-old son, Hopper Jack. Court papers cite “irreconcilable differences” for the split. The couple married in April 1996. The Penns have twice before filed for divorce or separation only to dismiss their petition a short time later.