How to make friends at new school, anyone?

Next year, I'm starting in a new school where everybody in the grade/class has known each others for years. I have never talked to anyone there before, how do I make friends with them? I've always had my friends for as long as I can remember, and I've been the guy who just stands by his current friends, I've never really tried to make new friends for the past years. Why? I have many good friends, I've just never really gotten to make new friends, but now I will have to. How do I become friends with people who know each other well but have no idea who I am?