With an ultraflattering shape, Spring blue hue, and the fact that it's fit for a number of occasions, Emmy Rossum's icy Temperley London dress is the kind that's easy to take from the red carpet to our own noncelebrity events. That means even if you're not attending a Broadway premiere like Emmy, there are plenty of reasons to add this party dress (or something like it) to your closet for seasonal cocktail parties, wedding season, and beyond. For starters, this dress is like a waist-defining secret weapon that narrows your middle with the side paneling and a fit-and-flare silhouette. In baby blue (or the pastel of your choosing), you can safely take this party dress to any wedding without fear of offending the bride, and if you're looking for the right accessories to complete your wedding guest attire, Emmy has that, too: a pair of metallic heels that complement — but won't upstage — your cocktail dress. We can hardly think of a reason not to shop the look — channel Emmy's party-perfect ensemble with our editors' picks.