Invitation Wording Help

We are thinking of having a champagne reception an hour before the ceremony.  Do we add this to the actual wedding invitation or on the reception card?  Any suggestions on how to word this.

thx

I would add it to the reception card or even a smaller card just for the pre-ceremony reception. We had all of the different events/information on seperate cards but you have to watch the weight; if your envelope gets too heavy with having numerous cards inside you might need more postage.