women's black cocktail dress Midi-Length Designer by La Femme Dare to make an entrance Leely Women Sparkly Black Bodycon

We love this option from Wrangler

The younger Middleton sister, 30, became an instant celebrity after donning the curve-hugging gown, which showed off her posterior to very flattering effect

If you are attending the event with someone, you can certainly wear a bow or long tie that matches the color of her dress (which requires a floor-length gown in black-tie wedding dress codes for women)

Perfect for: Cocktail parties, date nights, birthday dinners, evening events, rooftop gatherings, and special-occasion photos

This elastic satin bridesmaid dress features V neckline with spaghetti straps, mermaid long skirt with train

The oversized sweatshirt adds structure that balances the fitted bottom, while the running sneakers bring genuine comfort