Although there are exception the general rule is that most people must reside in the US for at least years before they can apply for citizenship. In the case of spouses of citizen that waiting time is?

The general rule is that most people must reside in the U.S. for at least five years before they can apply for citizenship. However, for spouses of U.S. citizens, the waiting time is reduced to three years, provided they have been living together with their citizen spouse during that period. This expedited process recognizes the unique circumstances of married couples.