Hayden Panettiere's Cause of Death Officially Confirmed
Hayden Panettiere's official cause of death has been confirmed, more than a month after the actress was found unresponsive in South Carolina.
The Greenville County Coroner's Office confirmed on Tuesday, September 22, that Panettiere died of an accidental overdose, ruling the cause of death as the toxic effects of fentanyl, 4-ANPP, alprazolam, methocarbamol and quetiapine. The manner of death was ruled an accident.
Panettiere, known for her roles in "Heroes," "Nashville" and the "Scream" franchise, died on August 16, 2026, at age 36. She was found in cardiac arrest at a residence in Greenville, South Carolina, where she had been staying temporarily. Emergency responders attempted to revive her, but she was pronounced dead at 2:32 p.m.
What the Coroner Found
In the weeks following Panettiere's death, the coroner's office said in a statement that "no signs of trauma were discovered" during the autopsy, and that her cause and manner of death remained pending further investigation and additional testing. Toxicology results were expected to take two to three months, according to Panettiere's mother, Lesley Vogel. That timeline has now been confirmed with Tuesday's ruling.
Earlier Reports Pointed to a Fentanyl-Laced Pill
Weeks before the official ruling, multiple law enforcement sources told TMZ that they believed Panettiere had overdosed on an oxycodone pill laced with fentanyl on the morning of her death. The outlet reported that she had a longtime drug dealer in Los Angeles who allegedly supplied her with black-market prescription drugs, and that she took several of those drugs during a flight from Los Angeles to South Carolina the day before she died. Sources told TMZ the alleged dealer was the subject of a Drug Enforcement Administration investigation.
At the time, Panettiere's representative pushed back on the reporting, calling the claims "unverified hearsay" and noting that her death remained under investigation pending toxicology results. The coroner's office has now confirmed the overdose involved fentanyl along with four other substances, including 4-ANPP, a chemical associated with illicit fentanyl production, and alprazolam, methocarbamol and quetiapine.
Police previously said Panettiere's on-and-off boyfriend, Brian Hickerson, and his brother Zach were with her at the time of her death and were the ones who called 911.
A Long, Public Battle With Addiction
Panettiere spent eight months in a treatment facility in 2020 to address opioid and alcohol addiction. She has said postpartum depression following the 2014 birth of her daughter played a role in her struggles, telling Gayle King in a May interview that she had been "self-medicating and looking for relief" during that period. Earlier this year, she released a memoir, "This Is Me: A Reckoning," addressing her childhood, career and personal struggles.
Panettiere's family has faced loss before. Her younger brother, Jansen Panettiere, died in 2023 at age 28, with the family later confirming his cause of death was cardiomegaly, or an enlarged heart, coupled with aortic valve complications.
If you or someone you know is struggling with substance use, the SAMHSA National Helpline is available at 1-800-662-4357.
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