(December 2009- Present) Engaged (April 2013) (1 Child)

Panettiere met heavyweight boxing world-champion Wladimir Klitschko in 2009 at a mutual acquaintance's party, and they soon began dating. Panettiere was ringside for Klitschko's knockout victory over Samuel Peter on September 11, 2010. In May 2011, Panettiere announced that she and Klitschko had broken up amicably after two years together. Both cited the long-distance nature of their relationship as the reason, and said they would remain close friends. In an April 2013 interview, Panettiere confirmed reports that she and Klitschko had resumed their romantic relationship.

Wearing a neon pink string bikini, "Heroes" star Hayden Panettiere was spotted getting cozy poolside in Miami with boxing heavyweight champ Wladamir Klitschko, popsugar reports in Miami, Florida on New Year’s Eve Thursday (December 31).

Celebitchy.com reports Klitschko and Panettiere have been spotted together once before, at an L.A. nightclub last February, according to In Touch Weekly.

Panettiere "was sitting on his lap and flirting with him all night," an onlooker said at the time. "It seemed as if they had known each other for a while."

on May 28, 2014 it was announced that Hayden and her Fiance Wladimir were expecting their first child.

Dec 13,2014

Her little princess is here! Hayden Panettiere and her fiance Wladimir Klitschko have welcomed their first child together. The couple's little one, Kaya Klitschko, weighed in at 7 lbs., 14 oz., and measured 20 inches and arrived on Tuesday, Dec. 9.