Robert Joseph Gilliam, the 62-year-old estranged husband of "That 70s Show" actress Lisa Robin Kelly, has outlived his 43-year-old wife, who reportedly died of unknown causes in her sleep at a rehab facility Wednesday evening.

Not much is publicly known about Gilliam, beyond the fact that he and Kelly had a highly volatile relationship that featured alcohol abuse, arrests on assault charges and viscious fights.

Their relationship was apparently so fraught that the actress filed for divorce from Gilliam in July, less than a year after their October 2012 wedding, according to the gossip website

Kelly filed for divorce after the troubled couple had a massive argument that led the actress to obtain a restraining order against her husband:

"What triggered the divorce? Wild guess ... but it probably has to do with yet another domestic dispute that occurred between the couple in May in L.A. According to Lisa, the argument started because Gilliam wanted her to empty her bank account and give him her money," TMZ wrote. "She refused, and claims Gilliam attacked her, pulling her hair, throwing her to the ground, and choking her. She says he even threatened to shoot her. Lisa says she tried to call police, but Gilliam snatched away her phone. Luckily, a neighbor called the cops for her and Gilliam was arrested."

Gilliam went on to be "convicted of domestic battery and was sentenced to 3 years probation plus time served in jail (69 days)," TMZ reported, adding that he was also required to attend a year-long domestic violence course.

Gilliam first made negative headlines in November, when the Associated Press reported he and Kelly were arrested following a disturbance at their home in Mooresville, N.C., a suburb of Charlotte. Gilliam was charged with misdemeanor assault on a female, while Kelly was charged with misdemeanor assault in connection with the incident, according to the AP.

They were booked at the Iredell County Detention Center and each posted $500 bond before being released.  The pair were scheduled at the time to appear in court on Jan. 25, but the North Carolina Department of Public Safety Offender Public Information's public database does not currently contain any record of either arrests, and follow-up news reports could not be immediately found Thursday evening.

Kelly's death came at the end of a troubled life that saw her featured not only in police blotters and gossip magazines for being arrested at least four times in recent years, according to TMZ, but also in popular TV shows like "That 70s Show" -- in which she played the character Laurie Forman, known best as Eric Forman's older sister -- and "Married With Children," as well as a number of other roles.

Kelly's agent, Craig Wyckoff, issued a statement to People magazine confirming that she had died.

"Unfortunately Lisa Robin Kelly passed away last evening. Lisa had voluntarily checked herself into a treatment facility early this week where she was battling the addiction problems that have plagued her these past few years," Wyckoff's statement said. "I spoke to her on Monday and she was hopeful and confident, looking forward to putting this part of her life behind her. Last night she lost the battle. Cause of death has not been issued yet and no death certificate has been issued either."