You Won't Be Able to Tell These Celebrity Look-Alikes Apart! (PHOTOS)

Arrow star Stephen Arnell is one part sweet-faced charmer and two parts ruggedly ripped action hero. NCIS: LA’s Chris O’Donnell has always had that blue-eyed boyish thing on lock, so we hope he’s willing to share the spotlight with our handsome newcomer. We don't think it should be a problem — after all, Chris is used to the whole “side kick” thing...