I am a permant residential(green card), I am marrying a US citizen, will I become a citizen or how long do I have to wait to become one?

It will take about about 6 months to get the green card and then a few years later you can apply to be a citizen. The process is relatively easy if you can prove that it is not a marriage of convenience (meaning yuour not just marrying for citizenship in the US) and will cost around $2000.00

Petitioning Procedures: Bringing a Spouse (Husband or Wife) to Live in the United States