Paula Patton Files for Divorce From Estranged Husband Robin Thicke

— -- After being separated since earlier this year, Paula Patton has filed for divorce from her estranged husband Robin Thicke, ABC News has confirmed through reps for the couple.

The couple was married almost a decade and are parents to 4-year-old son Julian, but Patton cited "irreconcilable differences" in divorce papers filed in LA last week, People magazine reports. The "Mission Impossible" actress, 38, is asking for joint custody.

Read: Paula Patton and Robin Thicke Separate

Related: Robin Thicke Dedicates Song to Paula Patton After Split

The separation first happened in February after months of infidelity speculation on the part of Thicke, 37.

"We will always love each other and be best friends, however, we have mutually decided to separate at this time," Patton, 38, told People on Feb. 24.

Right after the split, Thicke went out trying to win his wife back.

"For those of you who don't know, my wife and I got separated a few days ago," Thicke said to the audience during a concert in Virginia later in February. "But you know, I want everybody here to know that I'm trying to get my girl back."

He later released an album "Paula" in July dedicated to his ex.