Sienna Miller and Jude Law flaunted their on-again status by appearing side by side on the red carpet at tonight's Costume Institute Gala in NYC! Former Vogue cover girl Sienna showed some skin with her low-cut and high-slit Emilio Pucci number, while Jude was perfectly dapper in his suit. Sienna's sister and Twenty8Twelve design partner Savannah, meanwhile, hung in the background in gold. Jude and Sienna looked thrilled to be back to posing together, but make sure you let us know what you think of her look with Fab and Bella's live polls!
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