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(CBS NEWS) -- Lisa Robin Kelly, who starred in "That '70s Show," has died. She was 43.

Her agent told ETonline in a statement that Kelly died Wednesday night, adding, "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. 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."

A cause of death has not been revealed yet.

Kelly has battled addiction over the years and was arrested in June in Southern California on suspicion of drunken driving. She and her husband, Robert Joseph Gilliam, were arrested in November 2012 in connection to a disturbance at their home in the Charlotte, N.C., suburb of Mooresville.

TMZ reports that Kelly had filed for divorce from her husband in July.

Kelly portrayed Laurie Forman, the sister of Topher Grace's lead character Eric, on the Fox series, which ended in 2006. Since then, she hadn't had a very active acting schedule -- aside from appearing in a 2012 short, called "SUX2BEME."

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