Hayden Panettiere showed off her incredibly toned bikini body on Sunday in Miami Beach, following rumors that she's secretly engaged to heavyweight boxer Wladimir Klitschko. The "Nashville" star showed off her curves in a tiny purple bikini as she soaked up the sun, and she showed off a diamond ring on her right finger. Neither the year-old actress, nor her rumored fiance, 37, have publicly commented on rumors of their engagement; however, Panettiere has been spotted wearing that diamond ring in several photos she's posted to her social media accounts in the days following the rumors. The couple began dating in , before splitting in , blaming the breakup on long distance. In January , they rekindled the romance, and sources say they are looking to keep things quiet before they tie the knot in a summer wedding , according to Us Weekly's sources. US Edition U.