Ok so first of all, if your under 15 our thriller would not be suitable for you.
It is quite violent and has wierd sexual references.
Ideally our audience, would obviously be all the thriller lovers out there :)
If your into bloody, gruesome and freaky stuff this is for you..
Someone who's into intrigue and mystery with a hnt of a twist. someone who like's to try and work things out for themselves but sometimes never quite gets there. a person who never gives up trying and will always give it a shot on working out what in happening, yet still loves the element of surprise........
In general ..
It really depends on the sub genre of the thriller film. Like all genres, there are sub-genres and to really give an accurate answer to your question you would have to specify what kind of thriller film.
Silence of the Lambs and No Country for Old Men are considered the two best thrillers in recent memory... and they're rated R. Their target audience was probably for the young male adults.
Meanwhile, younger and more female based ones there are those thrillers that are borderline horror films, such as The Sixth Sense, Signs, The Village. Since they're close to horror (and horror films target teenage girls).
And then there are legal thrillers (Fracture, Runaway Jury) and crime thrillers (Memento, Se7en) that target a more mature audience... and classic thrillers (any Alfred Hitchcock film) that are rated PG, but are intended for adults.