We're dying to know what Kate's wedding dress will look like, but the ensembles she's worn as a wedding guest might provide some clues about what she'll wear to her own.

In June of 2005—two years after Kate (right) and Wills started dating—the couple attended the wedding of his friend Hugh van Cutsem to Rose Astor. (The two weren't photographed together, as Wills was busy performing his duties as an usher.) Kate's prim-and-proper skirt suit was, dare we say, a little dullsville, but the combination of a simple black and white color palette and lace detail hints that Kate gravitates toward relatively classic designs with feminine touches.

Photo: Indigo/Getty Images

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