Even with a LQ picture that doesn’t provide much detail, the eagle eyes of @dwjclosett helped ID the dress Margot wore!
Excitedly a new designer for Margot, she wore the Heartmade Hylin Dress in Orange. Made from silk crepe, it features wide, ruffled cuffs, a back slit and a front keyhole cutout. It’s available to buy for £595.
I am fairly certain Margot is wearing a pair of sunglasses she has worn before, but I cannot be certain due to the quality.
However I can see that she rewore her Loeffler Randall Penny Bow-Detailed Plissé-Lamé Mules in Gold. These are available for £335.