Costume

As we are starting the film in the early 2000's, 5 years before now. So the clothing will have to fit that time.
So the children we are using will have to dress in that way, in clothes such as; denim jackets, 3 quarter length trousers, crop tops, hooch/bench/goldigga brands which were popular then. What each of them wear will also have to fit with the stereotypes they fit when 18.

The main characters 5 years on will have to wear up to date clothes. The stereotypical blonde girl will have to wear revealing/provocative clothes to signify she is sexually available. The brunette will wear simple, plain clothing which will connote she is quiet/timid and not sexually available.