We've all laughed at our parents' wedding photos (Mom, that floppy hat—really?). So, what exactly makes a wedding dress timeless? To find out, we asked top designers to point out the styles that continue to be popular several seasons (and even years) later.

Anna Maier/Ulla-Maija Couture

Whirlwind (1999)

"Whirlwind is the marriage of duchesse satin, and soft, yet dramatic lines," says designer Charles W. Bunstine II. "The ongoing success of this gown speaks for itself; the lines accentuate the waist and the bust, and the draped fabric has a gorgeous luster and sheen."

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Photo: Courtesy of Anna Maier/Ulla-Maija Couture