It looks very short to me. Perhaps a little bit inappropriate for a wedding. I'd just be concerned that you don't want to come across bit immodest or attention-grabbing.
No problem with leopard if it's an appropriate dress otherwise!
This is a nice leopard dress, suitable (in my opinion) for a wedding:
www.wyselondon.com/collections/leopard/products/jodi-dress-leopard
It would be nice with gold strappy sandals or black sling-back kitten heels?
Whatever you wear I hope you all have a super celebration xx