If you have a little extra money to spend on the wedding there's a lot of fun entertainment to be had.
On medieval fairs you will often find a fire juggler and he/she will probably not mind a wedding gig.
It will look very impressive in the evening when it's dark but you can also have them surprise your guests upon arrival to the party. The great jugglers won't just perform their dangerous tricks, they'll have this teasing cheeky attitude and they'll taunt and make jokes with the guests.
Jugglers were a common form of entertainment in the middle ages especially at the royal court, at big parties and weddings.