Can you say Constance Billard? The Age of Adaline star practically embodied Blair Waldorf energy, who went hard for the collegiate, quiet luxury aesthetic. Fortunately for A Simple Favor fans ...

But every Gossip Girl fan will know the true mark of a Blair Waldorf fan-girl was her headband ... Headbands have dominated the luxury market as much as they have dominated the high street.

The Waldorf Astoria will have 60 hotel rooms and suites, 37 multi-bedroom resort villas, and 50 exclusive private residences.