Before Emma Watson delivered a speech at the UN General Assembly earlier this week about sexual assault policies in universities, she posted a picture on Instagram of what she was wearing. This wasn't your usual outfit-of-the-day post though. In fact, it was the subtle announcement of her collaboration with New York-based ethical brand ZADY.

While most celebrity collaborations come about thanks to lengthy negotiations, it was Watson herself- a long time advocate of ethical fashion- who approached ZADY to create bespoke items for her to wear inspired by her style.

As well as refreshing her own wardrobe, it was important to Watson that her fans would also be able to purchase the pieces, getting the look in a way which is reassuringly sustainable. Therefore, the entire capsule collection will be available to purchase on the 31st October.

Watson will be posting pictures of the collection on her Instagram throughout October, and they will be available to pre-order online as soon she wears them.