Job Interview tomorrow???? Help!?

• social work degree

I'm going to a Job interview tomorrow and I'm kind of nervous. I'll be applying to be an Usher for a movie theater. I'm not sure what questions they'll ask and I'm not sure what to say? And how should I dress?

Additional Details

And this is my first job. I'm a 16 year old girl. Should I bring a resume? I wouldn't know what to fill it with I've never worked anywhere els.

Job Interview tomorrow???? Help!?