If you married a foreign national, or wish to bring your foreign-born fiancé into the U.S., the Chicago immigration lawyers at Sverdloff Law Group can help. The K-1 visa is only valid for 90 days. That means that you must marry within 90 days of your fiancé(e) entering the United States, otherwise, the visa expires and they will have to return to their home country. You should also note that the K-1 visa does not automatically transfer into permanent residence status (a green card) after you are married. Your new spouse will have to apply for their permanent resident status in addition to being approved for the original K-1 visa.