Twilight question....opinions wanted?

ok so this isn't one of those omg isn't twilight the best ever kind of question.i was more wondering if its just me or do the actors and actresses who portray the characters in the move look better in the movie than they do in real life.i was wondering if anyone else had noticed the same thing.i mean robs hair looks greasier in re all life ashley looks older Nikki looks blonde better and so forte but im just curious as if to anyones noticed the same