Celebrity divorces, breakups of 2011

Slideshow posted in Photos | Monday, January 03, 2011

45 of 105: Hayden Panettiere of 'Heroes' and 'Scream 4' fame and Wladmir Klitschko, a Ukrainian boxing champion, have split after dating for two years, the actress' spokesperson confirmed to OnTheRedCarpet.com on Thursday, May 12.

Prior to dating Klitschko, Panettiere was linked to her 'Heroes' co-star Milo Ventimiglia. The two dated for at least a year.

(Pictured: Hayden Panettiere appears in a promotional photo for NBC's 'Heroes.') (NBC)