Is "Nashville" star Hayden Panettiere engaged to boxer Wladimir Klitschko? Us Weekly said Wednesday that the actress, 23, and the Ukrainian heavyweight champion, 37, reconciled in January following a May 2011 breakup. They dated for two years prior. Though Panettiere is not wearing an engagement ring publicly, the magazine said the two may be planning a summer wedding. Panettiere previously dated Milo Ventimiglia, one of her co-stars on the NBC ensemble drama "Heroes," as well as "One Tree Hill" actor Stephen Colletti.