Guy Pearce - why?

Icarus1
MemberOvomorphJune 15, 2012889 Views11 RepliesI really liked Guy Pearce's performance in Prometheus. However, something seems strange about that casting choice. Why take a young actor (no matter the skill level) and coat him in tons of aging make-up when you could just cast an old dude in the first place. GP was great as PW in Ted Talk video, but in the big picture Prometheus itself is more important than this marketing video. So, why? Does RS have a more expanded role for GP as he ellaborates on PW's character? That is the only conclusion that makes sense to me. If so, I love that planning! It's always best to cast a character with the same actor for consistency.
Anyone have insight about this? Is there another thread that already addresses this?