What caused the death of Vladimir Klitschko's ex-fiancée, actress Panettiere

American actress Hayden Panettiere, known for her roles in the series ‘Heroes’ and ‘Nashville’, passed away at the age of 36. She was the former fiancée of Vladimir Klitschko and the mother of their daughter Kaya-Evdokiya. This was reported by 24 Channel.

The actress's death was confirmed by her representative and father Skip Panettiere. The family requested to respect her privacy and give her loved ones time to mourn the loss.

Cause of Hayden Panettiere's death as of August 17, 2026

The official cause of death for Panettiere has not yet been disclosed. Family representatives did not report where and under what circumstances the actress died. According to Reuters, the circumstances of her death are under investigation.

Therefore, there are currently no grounds to associate the actress's death with alcohol, drugs, depression, or other health issues. Panettiere had previously spoken openly about postpartum depression and addiction, but official sources have not mentioned these as causes of the tragedy.

The actress’s father described his daughter in a statement as an incredible light and a strong personality who brought joy to her loved ones and millions of viewers. Similar information regarding the lack of an established cause of death was published by the Associated Press.

What connected Hayden Panettiere and Vladimir Klitschko

Panettiere and Klitschko began dating in 2009. In 2013, the couple announced their engagement, and the following year their daughter Kaya-Evdokiya was born. Their relationship ended in 2018.

After the breakup, their daughter mostly lived with her father and his family. The actress explained this by her difficult psychological state and struggles with addiction. After rehabilitation, she returned to work and filmed in ‘Scream 6’ in 2023.

Panettiere's last project was the psychological film ‘Mind’s Eye’, which was released in early 2026. In May, the actress also published her memoirs, in which she spoke about her career, motherhood, addiction, and the loss of her younger brother.

Following the start of Russia's full-scale invasion, Panettiere supported Ukraine and established a fund to help people affected by the war.

It is worth noting that the mayor of Kyiv, Vitali Klitschko, congratulated his brother, Ukrainian boxer Vladimir Klitschko, on his 50th birthday via social media.