How do you talk to quiet people?

There’s this guy, who’s new to our school. He hangs around one other person.. and that is his distant cousin. He seems very interesting and cool, but really only has one other friend. I want to get to know him and become friends with him, but i find that kind of hard because i have nothing to talk to him about, and he’s ‘somewhat’ quiet.. more like he doesn’t talk as much to make friends, but talks enough to get around. What could I say or do to become friends with him and get to know him better?