Mr. & Mrs. or Dr. & Mrs. ?

Hi all! My fiance has his PhD and we are trying to figure out how to be introduced at our wedding. Should we be announced as Dr. & Mrs. ? Or Mr. & Mrs. ? This will also answer to what our cake topper will say, etc. I love the traditional aspect of the Mr. & Mrs. on everything but hes worked so hard for his PhD that I want to acknowledge that if its the correct way to be announced. I just want to come off as pretentious to our guests if its not necessary. Does anyone have any experience with this?