Actress Hayden Panettiere, who died at 36, expressed a hope for "world peace" in her final text message to a close friend, musician Clayton Johnson. Panettiere was found unresponsive at an apartment in Greenville, South Carolina, on Sunday and later pronounced dead.

Police and the local coroner's office are investigating the death. Preliminary findings have not indicated foul play or suspicious circumstances. Narcan, an opioid overdose reversal spray, was found in the apartment where Panettiere died. 911 audio indicated the actress had suffered cardiac arrest following a suspected overdose. An autopsy has been completed, and the coroner stated that no signs of trauma were discovered that would have contributed to her death.

"Honestly, people think it’s a joke to ask for world peace, but that would be me," Panettiere texted to Johnson, according to a tribute he posted. "That was you in a nutshell. I’m grateful I got to know you, and I’ll always be grateful for the memories. Fly high, Hayden."

Panettiere, known for her roles as Claire Bennet on "Heroes" and Juliette Barnes on "Nashville," had a history of addiction, which she detailed in her May memoir, "This Is Me: A Reckoning." She began using substances at age 15 and later struggled with postpartum depression and alcohol dependency after the birth of her daughter, Kaya, in 2014.

Panettiere had shared in a 2022 interview that she had been sober in recent years, describing sobriety as an "everyday battle" and "an everyday choice."

She had previously given full custody of her daughter, now 11, to her former fiancé, Ukrainian boxer Wladimir Klitschko, explaining on a podcast that she needed to prioritize her daughter's well-being and seek help for herself. Panettiere described the separation from Kaya as "the most gut-wrenching experience of my life."

Kaya lives in Europe with Klitschko. Panettiere stated she maintained regular contact with her daughter and was proud of the young woman she was becoming. She also reflected on her struggles with postpartum depression and subsequent drinking, noting that she felt the "root cause" of her addiction was not adequately addressed during treatment.

Panettiere was pronounced dead at 2:32 p.m. on Sunday, just over 40 minutes after the initial 911 call was made. Investigations are ongoing to establish the official cause of death.