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.

The dress Kate wore to Harry Meade and Rosie Bradford's wedding combined two of her fashion must-haves—the color blue and and the designer Issa. Kate wore a now iconic blue dress by the same designer for her first post-engagement appearance with William. It's clear Kate loves that bright cobalt blue—is it a possible color for her bridesmaid dresses? And even though Bruce Oldfield is the rumored designer for Kate's ceremony gown, perhaps Issa is in the running to create Kate's party dress.

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