Hayden Panettiere with boyfriend

Hayden Panettiere hits the red carpet with her boyfriend, Ukranian boxer Wladimir Klitschko, at the Best of Musical Gala 2010 at the Color Line Arena in Hamburg, Germany. The 20-year-old Heroes actress, who is 5'1", posed for photos with her 33-year-old beau, who is 6'6".

Hayden chatted with Us Weekly at the premiere of Temple Grandin earlier this week and shared that she felt 'tired of being a blonde.' "It's fun to change things up," Hayden added, "and I feel I don't have to overcompensate as much personality-wise when I have red hair as I do with blonde hair."