Of course! There is nothing about atheism that says that people can not marry Christians, Jews, Muslims, Hindus or anyone else they choose. It happens all the time.
It's not illegal. In the Catholic church, the bishop can give permission for a church wedding of atheist to catholic and the couple might elect for a shortened service - without the mass. There will...
If the atheist has never been validly baptized, it is an impediment to marriage and requires dispensation from the local ordinary (Bishop of the diocese). If the person is a baptized non catholic...
Yes. But if you want a church wedding, you may need to ensure that the priest is willing to proceed on the basis of "don't ask, don't tell" about the non-Christian belief. However, in many countries,...