The couple were together 11 years and married for eight. They have no children together.
TMZ said Friday Lane cited "irreconcilable differences" as the reason for the split in her Feb. 15 divorce filing.
She also noted the legal date of her separation from Brolin as Feb. 13.
The film stars confirmed their breakup to the media Thursday.
Ohio crash that killed two caught on camera [VIDEO]
Obama 'selfie' photographer speaks out: 'Photos can lie'