Hollywood is mourning the loss of actress Hayden Panettiere, who died on August 16 at the age of 36. The Heroes and Nashville star was found unresponsive at her apartment in Greenville, South Carolina, on Sunday afternoon, according to police. Emergency responders attempted lifesaving measures, but Panettiere was pronounced dead at the scene. Authorities have confirmed that the cause of death remains under investigation. Preliminary findings have shown no signs of foul play, suspicious circumstances, or physical trauma.

In a statement released through ABC News, Panettiere's father, Alan "Skip" Panettiere, announced the family's loss, saying it was "with profound sadness" that they shared news of Hayden's death. He described his daughter as "an incredible light and a force of nature" who brought "immeasurable love and joy" to those who knew her and to millions of fans around the world. The family has asked for privacy as they grieve what they called an unimaginable loss.

The tragedy comes just three years after the death of Hayden's younger brother, actor Jansen Panettiere, who died in February 2023 at the age of 28. Medical examiners determined that Jansen died from complications related to cardiomegaly, commonly known as an enlarged heart, along with aortic valve complications. Hayden spoke openly about the devastating impact of losing her only sibling, once saying she felt as though she had lost "half of my soul."

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With Hayden's death occurring only three years after Jansen's passing, their parents, Skip and Lesley Panettiere, have now endured the unimaginable loss of both of their children. The heartbreaking reality has resonated deeply across social media, where fans and fellow celebrities have expressed sorrow not only for Hayden's passing but for the profound grief now facing her family.

Police in Greenville said officers and emergency medical personnel responded to a report of an unresponsive woman at approximately 1:50 p.m. on Sunday. According to authorities, medical assistance was immediately administered upon arrival. An acquaintance reportedly placed the 911 call. Investigators said the case remains active, but early findings have not revealed evidence of criminal activity or suspicious circumstances. An autopsy has been completed, though officials say the final cause and manner of death are pending additional examination and testing.

Panettiere had recently reintroduced herself to the public through her deeply personal memoir, This Is Me: A Reckoning, which was published in May 2026. In the New York Times bestselling book, she detailed her struggles with addiction, postpartum depression, abusive relationships, family turmoil, and the emotional pain of losing custody of her daughter, Kaya. The memoir was widely praised for its honesty and vulnerability, with Panettiere describing it as an effort to reclaim her story after years of public scrutiny.

Only months before her death, Panettiere spoke optimistically about the future while promoting the memoir. She reflected on years of recovery and personal growth, saying she felt she still had much life left to live. Friends and fans viewed the book as the beginning of a new chapter for the actress, making news of her death all the more shocking.

Tributes from across the entertainment industry poured in within hours of the announcement.

Heroes co-star David Anders remembered Panettiere as "a kind, joyful, professional" friend and recalled her generosity toward cast and crew members throughout their years working together.

Actress Viola Davis shared a tribute describing Panettiere as "an old, wise soul" with a "deep heart," while recalling how much she and her husband enjoyed working alongside her.

David Arquette, who appeared alongside Panettiere in the Scream franchise, posted a simple but emotional message: "I love you Hayden."

Derek Hough said he was "heartbroken" by the news and remembered Panettiere as "so sweet" and "so kind," while Mario Lopez reflected on her warmth and beautiful spirit. Emma Roberts, Kim Cattrall, Melissa Barrera, Jeremy Renner, Naomi Campbell, Rosie O'Donnell and many others also shared tributes celebrating her talent, resilience and generosity.

Born in New York, Panettiere began acting as a child and grew into one of television's most recognizable stars. She became a household name as Claire Bennet in the hit NBC series Heroes before earning critical acclaim and two Golden Globe nominations for her portrayal of troubled country singer Juliette Barnes on Nashville. Throughout her career she also appeared in films including Remember the Titans, Raising Helen and the Scream franchise.

She is survived by her 11-year-old daughter, Kaya Evdokia Klitschko, whom she shared with former fiancé Wladimir Klitschko. Despite the challenges she detailed in her memoir, Panettiere frequently spoke of her love for her daughter and the close bond they maintained.

As investigations into her death continue, fans around the world are remembering not only an actress who spent more than three decades in the spotlight, but also a woman who openly confronted addiction, grief and mental health struggles in the hope of helping others.