According to Fulton County Superior Court in Georgia, the 40-year-old NFL alum -- who went by the nickname "Slash" during his playing days -- filed for divorce on March 22.
Stewart and Williams were married on May 21, 2011 -- they have no children together. Stewart has a son from a previous relationship.
Williams currently stars on "Real Housewives of Atlanta."
The issue of children came up often on the reality show -- Porsha wanted to have kids AND a career in charity work ... but Kordell told her she had to choose.
Also, According to the divorce docs, obtained by TMZ, Kordell says the marriage is "irretrievably broken" ... and claims the two are currently separated.
It seems Kordell also believes he shouldn't have to pay Porsha a single cent in spousal support ... claiming, "[She's] an able-bodied person, earning income and is capable of supporting herself."
Kordell also says there are no marital assets subject to division ... which suggests there is a prenuptial agreement in play.
Newsone also reports, Porsha, who thought her husband was as committed to saving their marriage as she claims to be, says she found out about the divorce from the tabloids. The following statement was released to the press on Tuesday on behalf of the granddaughter of the late-civil rights luminary Hosea Williams regarding her impending marital breakup:
Mrs. Stewart is disappointed about her husband’s recent filing for divorce. Mrs. Stewart had held off on filing for a divorce herself and remained committed to the marriage because Mr. Stewart promised to work on the marriage with her.
Instead, he misled her and she found out about the filing in the media. Mrs. Stewart hopes to resolve these personal issues privately with the support of her family, friends and strong faith.
Source TMZ and Newsone