By the way, there's no need to fill the balloons for a bride and groom sculpture with helium. In fact, I highly recommend you inflate the balloons with air to a) save cost and b) because air-filled balloons last longer.
In addition, you don't want to let your bride and groom sculptures float away, right?
The video below shows a quite unique bride and groom design by the guys from Balloon Market. It may not be exactly what you had in mind but still give you ideas and instructions on how to create the bride and groom to your liking.