womens long sleeve midi dress H&M Women’s Asymmetric Satin Pink Sleeves Pleated Dress. Size 6 This style is HV2799. Rock & Roll Cowgirl Women's
Description
And if they're very fancy and they've stated white tie well, you know what to do

The look would have looked better if she ditched the cape or sported one in a different color to split things up
Romantic and effortlessly refined, this plus-size lace wedding gown features a flattering modified A-line silhouette with a strapless sweetheart neckline that softly frames the dcolletage

Check out this similar shirt, vest, pants, mules, handbag, necklace, scarf and sunglasses

Accessories Veils: Pair a birdcage veil with a mini dress or a tea-length veil with a midi style for added elegance

That said, it is a good idea to know whats expected especially if you want to be a good guest and dress appropriately
