Can I bring my fiance to immigrate to America now? How long will it take?

First of all, if you are a green card, you can't directly apply for fiance immigration. You can only apply for K 1 (fiance visa) after naturalization. If it is a relative immigration green card, it takes five years to be naturalized, and it takes about 9- 12 months to apply for K 1. Secondly, the green card can apply for spouse immigration, but it takes two years, and the application process takes nearly one year, which is relatively slow recently;