Well, DH and I got married in church. He attended Sunday School there, and was confirmed in Liverpool Cathedral.
However, by the time we started going out, he had not been to church for many years, and no longer believed in God. In fact, he was never certain that he ever had.
However, we both grew up in that parish, and we got married before the time of many places having a licence to marry, so the options were to marry in the locality where we grew up or go to the next town, where the nearest Registry Office is, and marry in a town where neither of us had ever lived.
Also, my DH's uncle, now deceased, was a vicar in Liverpool and he was delighted when we asked if he would marry us in our local church.
Ultimately, we made the decision that was best for us almost 20 years ago, and there is no-one, irrespective of their beliefs, who will convince me that we did the wrong thing. Particularly as my mum passed away 13 days after we were married. She had no religious faith either, but I know she was glad that we had a wedding that was right for us,and thus she thoroughly enjoyed herself. That is what is most important to me now.