What part am I in Willy Wonka?

Well, i tried out for the play Willy Wonka and I got the part of Foompa Loompa. There are background oompa loompas and then ones with names like Foompa Loompa. There are seven ones with names, Foompa Loompa, Roompa Loompa, ect. But I'm wondering what is the difference between background oompa loompas and named ones? Am i gonna have lines? Singing parts? Please answer. I'm confuzzled..... Thanks!