The dress: Acorn strapless dupioni dress with shrug jacket. Style 5417, $400, Collection 20
Why it fits: The mother-of-bride will look polished from photo to finish in this structured dress. The sharp collar makes a statement that will set her apart (think Diane Keaton) but the detailed gathered bodice make the dress special enough that she can ditch the jacket once the dance floor heats up.
Photo: Courtesy of Watters