Margaery is one of my favorite characters from Game of Thrones (aside from Daeny), and I really enjoy her personality and style.

The skirt and shoulder 'pads' are made from casa satin in their now discontinued perwinkle blue.
The top was heavily altered from a blazer.
The belt ties on with a perwinkle ribbon and isn't 100% accurate (since I tie it in the back as a bow), I used craft foam, spray paint, and a pre-made rose flower for it.

The wig was styled by me.