what is a black tie dress code vs. Formal Attire: The Complete Guide | Generation Tux Black-Tie Dress Code for Women:
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On the runway: Cate Blanchett, romantic at The Golden Globes, 2014

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With its sleek hidden placket, sculptural sleeves, and striking color, every detail is intentional
The basque waist joins to a puffy A-line skirt with a chapel train

From flirty dresses to chic separates, each piece is designed to make a statement and stand out from the crowd, all styled by Katie Burnett

If it says black tie, that means tuxedos and elegant dresses with appropriate ties only, so cocktail attire for men at a wedding wont be suitable
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