American actress Hayden Panettiere, best known for her roles in the television series Heroes and Nashville, died on Sunday in Greenville, South Carolina, at the age of 36. Police reported no signs of foul play, while emergency dispatch records indicated responders had treated her for cardiac arrest following a possible overdose; the official cause of death has not yet been confirmed by the coroner's office. Her former partner, Ukrainian ex-boxing champion Wladimir Klitschko — with whom she shared an 11-year-old daughter, Kaya — said the family was in "profound shock and grief," adding that Panettiere had "left this world far too soon."