If you do wear it, OP, please don’t ruin it with a big hat and / or loads of pointless bling.
I wonder if people are missing the fact that this dress is made of silk (and presumably properly lined). The luxurious fabric and the way it should hang clearly make it wedding-worthy. It’s complete in itself and doesn’t need decoration or embellishment. Just really cool grooming and uncomplicated accessories (bag, shoes) to complement it.
Honestly, all the other guests will be wondering why they didn’t choose something so simple and elegant!