Who would be the audience for your media?

The target audience for my thriller film is middle aged teenagers, such as 15+, i have chosen this age group as i feel it is nessassery for the subject my film is about, it can alert young girls and boys but also entertain them, the sort of teenagers i would like to attract is people who like watching thrillers and enjoy things like this, although i want to attract a certain age of teenagers i want it to be a variety of different people with different views. Whether or not they are high - low class is not something that is important when choosing my target audience. It is about people who like a thriller genre film.