Missy Pyle in hand-dyed organic silk Valentina Delfino: From reading Alicia Silverstone's blog, The Kind Life - where Missy occasionally guest posts - I knew that she is on a journey to becoming vegan and living eco-friendly, but I didn't know she took the challenge to the red carpet. I thought her dress was such a breath of fresh air in a sea of colourless gowns.
Natalie Portman in 1954 vintage, reused Christian Dior: Red was a popular colour on the red carpet Sunday, and Natalie's dress was my favourite take on the trend. The cut and print make for such a classic combination and she - a long-time vegan and environmentalist - carried it beautifully.
Livia Firth in custom, recycled PET fabric Valentino: She is the creator of the Green Carpet Challenge, and did a great job of getting many designers on board the project, using eco-friendly options for the gowns they created.
Meryl Streep in custom, eco-certified fabric Lanvin gown: Her speech was one of my favourite moments of the entire show, and she joined Livia in the Green Carpet Challenge with this gold dress.
• All photos via People •