Absolutely not. The Bible says, “Do not be unequally yoked together with unbelievers … What accord has Christ with Belial” (2 Corinthians 6:14-15)? Billy Graham put it very succinctly a few years ago when he said that if you take an unbeliever for a mate you also get the devil for your father-in-law. Much heartache results when Christians marry unbelievers.
Some Christians go ahead and marry unbelievers, thinking that they can convert them after marriage. But if God has really chosen that man or woman for you, He is perfectly capable of bringing that person to Himself before the marriage. If He does not do it, it is a good enough sign that this marriage is not what He wants for you. Christians need to learn to wait on the Lord, to wait for what is right. Anything short of that can prove to be a dreadful mistake.