Actress Hayden Panettiere died of cardiac arrest at age 36 [1].

Panettiere was a prominent figure in U.S. television and film, known for her roles in "Nashville" and "Heroes." Her death follows the recent release of a memoir detailing her experiences with personal trauma.

Panettiere was pronounced dead on Sunday, Aug. 19, 2026 [1]. She had been found unresponsive three days earlier, on Aug. 16, 2026 [2], at an apartment in Greenville, South Carolina [1].

The cause of death was cardiac arrest [3]. This medical event occurred shortly after the actress published her memoir, which focused on childhood trauma [3].

Panettiere first gained widespread recognition for her role in the series "Heroes" before moving into music and drama in "Nashville." Her career spanned several decades of television and film production.

Local authorities in South Carolina confirmed the location of the incident as a residential apartment in Greenville [1]. No further details regarding the circumstances leading to the cardiac arrest have been released by officials.

Hayden Panettiere died of cardiac arrest at age 36

The timing of Panettiere's death, occurring shortly after the publication of a memoir about personal trauma, may draw public attention to the intersection of mental health and physical wellness. Her passing marks the loss of a versatile performer who transitioned from teen stardom to adult dramatic roles and advocacy.