These days most brides and grooms are paying for their own weddings and would like their invitation to come from them. Our most popular wording for this is something like
Lynn & Matthew (in script font)
together with their families (optional)
would like to invite you
Guest Name
to help them celebrate their marriage (or wedding)
On date
at (Ceremony details)
with a reception to follow at (reception details)
RSVP details and dress code
Hope this helps
Lynn