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Hayden Panettiere Shows Off Her Much Taller, Older Boyfriend (PHOTOS)

04/05/2010 05:12 am ET | Updated May 25, 2011

Hayden Panettiere and her boyfriend, Ukrainian heavyweight boxer Wladimir Klitschko, attended a musical gala together in Hamburg, Germany, over the weekend.

"[Age is] just a number," Hayden, 20, told Life & Style of their 13-year age difference. "It's not something that comes up in a typical conversation."

Apparently they don't let their height difference get it the way either. Hayden is 5'1" and Wladimir is 6'6."

Hayden previously dated 'Heroes' costar Milo Ventimiglia.

PHOTOS:

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