This is a list of Zac's movies. I've never seen them, but perhaps this will help you remember which one it is.
http://www.movies.com/actors/zac-efron/zac-efron-movies/p288148
There is this movie with Zac Efron. I don't know what it is but he's having sex with a girl and she looks upset cause she doesn't want to do it . Does anyone know the name of this movie?
So you want the name of a movie where Zac plays a rapist ...
I think it might be The Lucky One
