The honest answer is: it depends on who's asking, and which tradition's rules you mean. Islamic teaching treats this question differently depending on whether the Muslim partner is a man or a woman. Christian teaching varies by denomination — the Catholic Church has a specific legal process for it, while most Protestant traditions leave it to individual conscience and pastoral counsel. This guide walks through each angle clearly, rather than giving you one blanket "yes" or "no" that doesn't actually match anyone's real situation. The Short Answer A Muslim man marrying a Christian woman: Generally permitted in mainstream Islamic teaching. A Muslim woman marrying a Christian man: Generally not permitted in mainstream Islamic teaching, with some nuance if the man converts. A Christian marryin