Arquette filed papers in Los Angeles last week after which Cox filed her own petition to officially end their marriage.
The former couple is said to have refused to hire a lawyer to help them fill out with the legal paperwork and both state they are being represented by 'Self', reported TMZ Online.
There was no pre-nuptial agreement before the couple tied the knot and they have agreed to split the money earned during the 12 years the actors were together in half.
Both Cox and Arquette are asking for joint physical and legal custody of their eight-year-old daughter, Coco, and the actress wants her name legally restored to Courteney Cox.
The duo met on the sets of "Scream" in 1996 and got married in 1999.