Lisa Robin Kelly's Autopsy Results Released

Lisa Robin Kelly's cause of death was released by the Los Angeles County Coroner Friday.

The former That 70's Show actress died from "multiple drug intoxication," E! News can confirm.

The death was ruled an accident and clarified that the fatal injury occurred by oral ingestion. Kelly passed away on Aug. 15 after a lengthy struggle with drug addiction and ultimately lost her battle while in a California recovery center.

At the time, her publicist confirmed the sad news and added, "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."