The father of Hayden Panettiere's daughter, former boxing champion Wladimir Klitschko, shared a heartfelt statement on the actress' sudden death.

Hayden Panettiere’s ex Wladimir Klitschko, who is the father of her 11-year-old daughter Kaya, is mourning the actress following her death on Sunday at the age of 36. In an Instagram post late Monday night,

Wladimir Klitschko overcame crushing defeats to become a dominant heavyweight champion. Inside his record, title reign, and final fight.

Meet Wladimir Klitschko’s older brother Vitali, a former heavyweight champion who became the mayor of Kyiv.