Photo: The 2015 Green Carpet Challenge by Erdem, in partnership with Mercedes-Benz (Getty)1/11Anna Wintour, Livia Firth, Erdem Moralioglu, Natalie Massenet, and Vogue’s Sally Singer
Photo: The 2015 Green Carpet Challenge by Erdem, in partnership with Mercedes-Benz (Getty)2/11Baz Luhrmann and Christopher Bailey
Photo: The 2015 Green Carpet Challenge by Erdem, in partnership with Mercedes-Benz (Getty)3/11Immy Waterhouse and Suki Waterhouse
Photo: The 2015 Green Carpet Challenge by Erdem, in partnership with Mercedes-Benz (Getty)4/11Colin and Livia Firth
Photo: The 2015 Green Carpet Challenge by Erdem, in partnership with Mercedes-Benz (Getty)5/11Sophie Hunter
Photo: The 2015 Green Carpet Challenge by Erdem, in partnership with Mercedes-Benz (Getty)6/11Elizabeth McGovern
Photo: The 2015 Green Carpet Challenge by Erdem, in partnership with Mercedes-Benz (Getty)7/11Ellie Goulding and Dougie Poynter
Photo: The 2015 Green Carpet Challenge by Erdem, in partnership with Mercedes-Benz (Getty)8/11Jack Guinness
Photo: The 2015 Green Carpet Challenge by Erdem, in partnership with Mercedes-Benz (Getty)9/11Lily Cole
Photo: The 2015 Green Carpet Challenge by Erdem, in partnership with Mercedes-Benz (Getty)10/11Daisy Lowe
Photo: The 2015 Green Carpet Challenge by Erdem, in partnership with Mercedes-Benz (Getty)11/11Phoebe Collings-James in McQ