Nashville star Hayden Penettiere and heavyweight boxing champion, Wladimir Klitschko, announced their engagement on Wednesday’s episode of Live With Kelly & Michael. Panettiere, 24, became famous for her role on the TV series Heroes. The Ukrainian Klitschko, 37, won back his WBA and IBF heavyweight titles Saturday night, after defeating previously undefeated Alexander Povetkin. The two had been dating off and on since 2009.