The official divorce decree for Oh and Alexander Payne was filed the week before Christmas in Los Angeles; however TMZ.com said Wednesday that some of the financial arrangements were pending.
Oh's lawyers asked the court to grant the decree early so the couple could file separate tax returns for 2006, TMZ.com said.
Oh, the star of ABC's "Grey's Anatomy," married Payne in 2003. The couple split in 2005.
Payne directed "Sideways," in which Oh was among the stars.