Sweetheart neckline wedding dresses: a curved upper edge
A décolleté en cœur rises over the bust and dips at the center. The dip can be modest or pronounced, while the sides may meet straps, off-shoulder sleeves or a bare shoulder line. Its curve belongs to the bodice; it does not prescribe a skirt silhouette.
Lace against mikado
Baccara curves its sweetheart edge into an off-shoulder lace bodice. Floral pattern continues into long sheer sleeves, and a basque waist leads toward an A-line skirt with a high slit. Kloe shapes the same type of neckline through smooth, draped mikado above a pointed waist and broad skirt. Detachable lace sleeves can add upper-body texture without changing the underlying curve.
Baccara’s pattern makes the edge part of a continuous lace composition; Kloe’s plain fabric gives the curve and fold more space. Those differences matter more than the category name alone.
How is it different from a V-neck?
A Col en V forms a more direct point, while the sweetheart line uses paired curves. The shape can appear on robes de mariée bustier or with straps and sleeves.