Who says you have to wear heels with your cocktail dresses? Definitely not Alexa Chung, who stepped out in London last night in a sweet black fit-and-flare number and a pair of adorable Charlotte Olympia cat-face slippers. It's a more modern approach to the usual cocktail fare, one that's totally charming — and a lot more comfortable. The added bonus? It doesn't take much to re-create — in fact, you're just three pieces away from getting the same adorable look. Shop them all below!