What goes on before the gown does.

The right foundation garment does something a dress alone cannot: it lets the gown fall the way it was designed to. A structured bodice, a low back, an illusion neckline — each one assumes something is happening underneath, and the wrong assumption shows.

Start with your gown’s construction, not a general rule. A built-in corset or boning needs almost nothing beneath it — extra layers fight the structure rather than support it. A soft, unlined silhouette often benefits from light shapewear, chosen for smoothing rather than compression. And a low back or illusion panel rules out anything with visible seams or straps; your stylist will tell you exactly what disappears and what doesn’t once you’re in the gown.

Bring options to your fitting rather than deciding beforehand. What flatters your silhouette in theory doesn’t always behave the same way under six pounds of tulle. Your seamstress will see the gown move with you and can point you toward the piece that actually works — sometimes that’s shapewear, sometimes it’s simply the right bra, and sometimes it’s nothing at all.

One more thing worth knowing: whatever you choose, wear it to your final fitting. Alterations are measured against what’s underneath, and a different foundation on the day can shift how the gown sits.

This is one piece of the larger conversation — visit The Guide for more on getting ready for your fitting.