How to handle this situation? Is it time?

I’m having family problems. It’s my final year at school and it’s quite stressful enough as it is, without my parents only making it harder for me.
I have to apply to join a college in two weeks, and what I want to do at college is not something my parents will approve of. Quite lately they have been giving me religious lectures and how some stuff is forbidden and so on, and it’s really getting to me. I want to be an actor/filmwriter and want to study media and english literature at college, whilst they think that I should do accounting. Over here, college is free and my parents don’t have to pay anything, so it’s not like they’re paying for my education.
The stuff they say is really demotivating and puts me down.
Last year, my dad said I might as well forget getting good marks in my exams, as I had missed school due to an injury. I sat 3 and I got an A for 3.
They say that girls shouldn’t work, so you have no reason to go to University, and that you should get married early. They say that whatever I study shouldn’t be because I want to become something and that I take an interest in it, but because it will bring in better marriage proposals when the time comes. So, I’m feeling as if, what’s the point?
Shit. I was thinking, is it time that I leave home? I’ve got 6 months of school left but if I send in my college applications for the subjects I want and my parents find out, I know I’ll not be in a good state. Your advice?