The bride has a very pretty hairstyle with a very well-defined and neat structure. From the top you can see the bridal hair design splits the hair into thirds, approximately.
It is center-parted at the front for a few inches, with the hair going to the sides; then it is tight and pulled back; and then it has big, grouped spring curls at the back.
The style and position of the bridal tiara right at the point where the curls start enhances this classic wedding updo beautifully. In a way it's more like a headband than a tiara because it's further back than most brides have their tiaras, although you could say it's both. It dresses up her hair and keeps it in place.