What is the process of marriage between a U.S. citizen and an illegal immigrant?

If you have a driver's lisense and SS number it's just like regular. No its not. I tis a diffucult and long process it is actually not difficult at all....all you need is that persons birth certificate and valid i.d. you will also need your birth certificate and an i.d. a social security number is not necessary even though it is on the application. Believe i just got married to an illegal immigrant two weeks ago and am now starting the process for his visa.