No, but it may help, especially if the only thing you know about films is that they have actors in them. But going to school for it does not guarantee that you will become a writer or director. There are hundreds of job opportunities in filmmaking that need filling. I would do a little more research about what exactly interests you.
If you are thinking about film school, you should try these schools out:
University of New Orleans
These are considered the best, but other programs are getting large as well. You may meet some people who argue one way or another about film school, but the decision is yours.
I went to USC School of Cinematic Arts and work in the industry.