05/24/2011 05:39 pm ET Updated Dec 06, 2017

Maria Shriver Plans To File For Divorce From Arnold Schwarzenegger: Report

After hiring celebrity divorce lawyer Laura Wasser and a private investigator, it should come as no surprise that Maria Shriver plans to file for divorce from estranged ex Arnold Schwarzenegger.

"It's not a matter of if Maria will file for divorce, but when," a friend of Shriver's told RadarOnline.com.

Shriver and Schwarzenegger's combined net worth has been estimated at $500 million. According to famed divorce attorney Robert S. Cohen, if Shriver were to go through with her plans for the split, assets acquired during the marriage would be divided 50-50.

"The fact that he had a child out of wedlock is irrelevant to the financial split," Cohen told the Huffington Post.

Shriver and Schwarzenegger announced their separation on May 9, one week before Schwarzenegger admitted to fathering a child with former housekeeper Mildred Patricia Baena.

Baena--who, according to RadarOnline.com, obtained a secret DNA test proving Schwarznegger is the father--has also lawyered up, hiring Los Angeles firm Jacobson, Russell, Saltz & Fingerman.

At this time, it's unknown if Schwarzenegger has retained legal counsel.