When an actor is young and attractive, it only makes sense to cast him as the protagonist, the good guy, and that’s where many actors break through to stardom. But playing an evil character is so much more fun! It also gives an experienced actor the opportunity to show off his talent and versatility. Remember when pretty boy Heath Ledger was cast as The Joker? We had a hard time wrapping our heads around that one, but it worked. There have been quite a few actors who tried going to the dark side, with varying degrees of success, which you can read about at TVOM.
Am I dense today? I don't see a link.
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