Hayden Panettiere’s Cause of Death Revealed: Ruled an Accident The Greenville County Coroner’s Office has confirmed the cause of death for actress Hayden Panettiere, who passed away on August 16 at age 36. According to the official report, the cause of death was determined to be toxic effects of fentanyl, 4-ANPP, and alprazolam, and the death was ruled accidental. Authorities confirmed that the preliminary investigation found no signs of foul play or suspicious circumstances. Panettiere was found in cardiac arrest on August 16 at a residence in Greenville, South Carolina, after a 911 call. The actress, known for her roles in “Heroes,” “Nashville,” “Ice Princess,” and the “Scream” franchise, had long been open about her struggles with alcohol and drugs. Earlier this year, in May, she published a memoir titled “This Is Me: A Reckoning,” in which she candidly wrote about those battles and the impact of growing up in Hollywood. Panettiere is survived by her daughter, Kaya, whom she s...