You need to bring information on both you and your spouse:

1. Copies of passports (page with nonimmigrant visa needed for spouse)

2. Original birth certificates

3. Copy of your naturalization certificate or certificate of citizenship

4. Copy of your social security number

5. Both of your addresses from the last five years

6. Copy of marriage certificate

7. Copy of divorce certificate or date and place of divorce (if apply)
    -Prior spouse date of birth
    -Date and place marriage  

8. Two color photos each

9. Addresses of employment in the last five years

10. Both parents' names and their date, city, and country of birth (if known). Also needed is their current city and country of residence.