I'm temporarily leaving Lurker status out of sheer panic... I think I may have made a wording mistake on my invitation!
I worded them:
Together with their families
BRIDE
and
GROOM
request the pleasure of your company
at the celebration of their marriage
In hindsight, I'm wondering if the above bolded doesn't make it sound like we're having a vow renewal or post-wedding party? I just sent in the invitation and haven't received the proof yet, so I'm reasonably sure they'll let me make changes. Thoughts are kindly appreciated!