Challenge Accepted!

As the autumn edition of London Fashion Week rolls around, so too does the Green Carpet Challenge. Launching in 2013, the annual event is designed to show how sustainable fashion can hold its own on the red carpet.

This year's event, sponsored by BAFTA, was the most glamorous yet, with a ton of fashion icons and movie stars showing up at British film's Piccadilly HQ. Host and queen of the scene Lilia Firth welcomed guests in a stunning William Vintage gown, along with her husband, actor Colin Firth.

And what a rollcall! Victoria Beckham and Vogue editor Anna Wintour hoofed it to London fresh from New York Fashion Week, while Keira Knightley and Helena Bonham Carter brought a shot of Hollywood sunshine to the proceedings. Keira teamed her cream dress with a fairly-mined gold ring from Chopard's Green Carpet Collection.

But the hit of the show for some, including ethical fashion writer Lucy Siegel, was the launch of a new range of bio-degradable mannequins from Italian company Bonaveri. Made from a sugarcane derivative called BPlast, the mannequins look and feel just like traditional dummies, but are made using a significantly smaller carbon footprint. Bonaveri says:

“It has been a difficult path full of surprises; but thanks to commitment and expertise we are able to offer our customers a product which is environmentally conscious and aesthetically impeccable."

The Green Carpet Challenge event, which also included a screening of The Last Monday In May, is another step up towards the influence of ethical fashion on the mainstream. It attracted gushing headlines across the planet, and highlighted how Livia and her company Eco-Age are luring in an audience with a little dose of glamour.

For more, and to check out a slideshow of images from the night, do slide over to Vogue, darling.