The green princess dress shows a shaped front bodice area with vertical lines. A ruffled brown edge follows the open shoulder area. Below it, the visible skirt spreads into larger folds and gathered-looking surfaces. A diagonally running decorated edge marks the transition between bodice and skirt. This close view excludes the lower hem, shoes and complete rear outline, so keep those missing areas separate from your question about the top.
Begin the styling choice at the boundary between green and brown. Do you want that softer contrast along the upper edge or a more continuous green area? Then decide how clearly the front centre should be distinguished from the sides. A pronounced colour field can be paired with another skirt decoration. Use this image to describe a desired detail rather than treating the complete scene as an indivisible package.
The shaped front does not prove a separate corset. At a real fitting, check the neck edge, room for arm movement and transition to the skirt together. Ask to have the connection and fastening shown. Also assess your intended earrings and hair beside the ruffled edge. Neither the green shade nor its reflections reliably establish a fibre or inner construction; request those details for the specific garment if they affect your choice.