Luxury to me means peace of mind," she said. Specifically, knowing that what she is wearing has been ethically sourced and produced.
For the past few years, Watson has resolved that all of her red carpet appearances incorporate sustainable fashion.
Met gala 2016: Fashion veers into tech on the red carpet
In the case of the Met gala, this meant the majority of the fabric used was made from Newlife, a yarn made from 100 percent post-consumer plastic bottles; and the detailing on the bustier was made with organic silk and cotton.