The sad tale of the late "That '70s Show" actress Lisa Robin Kelly just gets sadder.
The L.A. County coroner has officially ruled Kelly's death an accidental overdose from "multiple drug intoxication."
The 43-year-old actress passed away on Aug. 15 at a rehab center in L.A., but an immediate autopsy proved inconclusive. The coroner needed additional toxicology tests to determine the exact cause of death.
Friday's preliminary report did not specify which drugs were in Kelly's system; a full accounting is expected within a few weeks, according to Chief Coroner Investigator Craig Harvey.
Kelly had entered the rehab facility after being hospitalized with a nearly fatal blood alcohol level of 0.34. The actress had struggled with addiction for years.
The veteran actress got her start in 1992 on "Married … With Children." Her credits included "Murphy Brown," "Charmed," "Silk Stockings," and as Eric Foreman's sister on "That '70s Show." Her drug-fueled erratic behavior led to her eventual ouster from "That '70s Show" and the downfall of her acting career.
She told ABC News that her problems began after a miscarriage in 2010.
"I had lost a baby," she said. "As a result of that, I lost it. I lost everything and I was abusing alcohol."
At the time of her death, Kelly's rep said, "She had been fighting demons for a while and finally lost her battle."