Actress Paula Patton has officially filed for divorce from estranged husband Robin Thicke after months of separation.

The couple announced its split in February (14) after almost nine years of marriage, and on Wednesday (08Oct14), Patton submitted documents in a Los Angeles court citing "irreconcilable differences", according to legal papers obtained by

The Precious star is also seeking joint custody for the couple's four-year-old son, Julian.

Despite the Blurred Lines hitmaker's various attempts to win Patton back, including naming his most recent love songs album Paula, it appears she wants no part of a reconciliation.

In July (14), the former couple put its sprawling Los Angeles mansion on the market.