Who would be the audience for your media product?

I researched the audiences of thriller films on the internet by looking at the BBFC ratings on http://www.bbfc.co.uk/ and I looked at the ratings of the of the 'TopRated Thriller Titles' on http://www.imdb.com/chart/thriller and found that the majority were either certifcate '15' or '18' therefore I decided to aim my product at teenagers and adults of both genders.