Emma Watson Dress

While Emma Watson had heads turning in her her Calvin Klein trouser-gown hybrid at this year's Met Gala, there was more to the look than first met the eye. The actress collaborated with Eco Age and Calvin Klein on making her outfit entirely sustainable for the Green Carpet Challenge.

Plastic is one of the biggest pollutants on the planet, Watson wrote on her Facebook page. Being able to repurpose this waste and incorporate it into my gown for the Met Gala proves the power that creativity, technology and fashion can have by working together.

Every part of the gown was produced with sustainability in mind, she explained - from the zips (recycled materials) to the inner bustier (organic cotton).

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Conventional cotton is one of the highest impact crops, using more chemicals than any other crop in the world, she continued. Organic cotton on the other hand, is grown without the use of the most harmful chemicals and is therefore better for the environment and people working with cotton. The organic silk used in the lining of my gown is certified to a standard that guarantees the highest environmental and social standards throughout production.

And not for Emma the one-wear policy adopted by so many stars; the actress revealed that she plans to repurpose the five-piece look as part of the #30Wears initiative (encouraging consumers to wear an item of clothing at least 30 times).

It is my intention to repurpose elements of the gown for future use, she wrote. The trousers can be worn on their own, as can the bustier, the train can be used for a future red carpet look… I'm looking forward to experimenting with this. Truly beautiful things should be worn again and again and again.

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Following Watson's collaboration, Calvin Klein also created two further sustainable looks for the Met Gala, worn by Margot Robbie and Lupita Nyong'o. While Robbie's dress was lined with organic Italian silk and featured zips made from recycled materials, Nyong'o's dress was painstakingly handcrafted in the Calvin Klein New York atelier.

It was such an amazing experience to work with the Calvin Klein team on Emma's gown and so wonderful to have her support to also push them even further and work on GCC principles for Margot and Lupita's gowns, Eco Age's Livia Firth told us. Emma is a rare example of someone who truly walks the walk, and I hugely admire her for this. Andrew Bolton, who curated this year's exhibition Manus X Machina, said that people lose sight of the materiality and artistry that into fashion today - and the GCC is truly a tribute to this. Telling the stories behind, pushing boundaries with designers, using innovative and more eco-friendly materials for a just and successful future of fashion.

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But the lace dress by far was the star garment on Watson's Instagram Stories. And for good reason; it's a work of art:

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Here's the look she wore at Elton John's party. One night, three looks. One of the only stars to have more outfit changes was Rihanna, who had a fourth outfit for Beyoncé's Oscars after-party.

Watson has kept a remarkably low profile, with the Oscars being her most public outing in a long time. Watson did speak candidly to

“I was like, ‘Why does everyone make such a big fuss about turning 30?” she said of when she was in her late 20s. “This is not a big deal…’ Cut to 29, and I’m like, ‘Oh my God, I feel so stressed and anxious. And I realize it’s because there is suddenly this bloody influx of subliminal messaging around. If you have not built a home, if you do not have a husband, if you do not have a baby, and you are turning 30, and you’re not in some incredibly secure, stable place in your career, or you’re still figuring things out… there’s just this incredible amount of anxiety.”

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She added then that while she was dating, albeit not anyone seriously, she was happy being unmarried. “I never believed the whole ‘I’m happy single’ spiel, ” she said. “I was like, ‘This is totally spiel.’ It took me a long time, but I’m very happy [being single]. I call it being self-partnered.”

Watson didn't pose with any date during her Oscar outings last night. She was last rumored to be dating Brandon Green, the son of fashion tycoon Sir Philip Green, in August.

Alyssa Bailey is the senior news and strategy editor at , where she oversees coverage of celebrities and royals (particularly Meghan Markle and Kate Middleton). She previously held positions at

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When she's not working, she loves running around Central Park, making people take #ootd pics of her, and exploring New York City.

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