What can my fiancé and I do to become US citizens if we are both international students and during our studies, we got married?

Best wishes for your marriage plans. Regarding immigration, there is no process by which a foreign national may go directly from having an F1 nonimmigrant visa to becoming a U.S. citizen. Instead, the first step is to succeed in an appropriate application to "adjust status" to become a Lawful Permanent Resident (to get a "Green Card"). Generally after having been a Permanent Resident for five years, one may become eligible to apply to become a naturalized U.S. citizen. It would be wise to work with an immigration attorney to assess eligibilities, options and strategies that may be available for you and your fianc? to apply to adjust status. Generally application fall into family-based applications and employment-based applications, each with their own eligibility requirements and application processes. Some immigration law firms, including mine, offer legal services on a "flat fee" basis so that a client will know the total expense from the very beginning, and a few immigration law firms, including mine, offer an initial consultation free of charge. [Note: This communication is intended as general information and not specific legal advice, and this communication does not create an attorney-client relationship.]