If your fiancé(e) is not a citizen of the United States and you plan to get married in the United States, then you must file a petition with INS on behalf of your fiancé(e). After the petition is approved, your fiancé(e) must obtain a visa issued at a U.S. Embassy or consulate abroad. The marriage must take place within 90 days of your fiancé(e) entering the United States.
no subject
more specifically:
http://www.usais.org/fiancevisas.htm
If your fiancé(e) is not a citizen of the United States and you plan to get married in the United States, then you must file a petition with INS on behalf of your fiancé(e). After the petition is approved, your fiancé(e) must obtain a visa issued at a U.S. Embassy or consulate abroad. The marriage must take place within 90 days of your fiancé(e) entering the United States.