Tell the interviewer that you got married, and bring the marriage certificate to the interview because they might ask for it.
Did you change your name yet? If yes, you should update them about it at or before the interview because it means they will also have to do a name check for the new name. If you didn't change your name, you can change it as part of the naturalization process and they will not do another name check for it, but it may mean your oath could get delayed by a few weeks because for name changes you have to do a judicial oath, not the regular administrative oath.