Great Gatsby 2008

I have to do this project for my English class of making The Great Gatsby into a modern day movie script. I need some real life actors that can play the characters in the book. So if you know any please tell me. The actors need to have the same personalities as the characters in the book. I need to write a movie script, so I need to just get a list of the actors who can play those characters in the book that are living today of course, I hope that sounds more clear than in the top.