Here's a two-piece long lace prom dress that is flirty, fun, and fabulous. From the designers at La Femme, this beautiful long lace formal dress features a strapless sweetheart crop top and matching long mermaid skirt in delicate lace. The two-piece long designer dress has a sweetheart neckline and a long mermaid skirt that smooths over the hips before flaring away from the knees to the floor. Undeniably gorgeous for prom, galas, and other fancy formals, this two-piece long lace prom dress by La Femme kicks up the wow factor while allowing you to stick to a budget.