Whilst browsing CoutureLab.com I was surprised to stumbled across the Alexis Mabille Fall 2008 Couture dress, which Keira Knightley wore to “The Duchess” London premiere back in September last year and Dita von Teese wore to a “Dsquared² cocktail reception” during “Cannes Film Festival”.

It not often you find a runway couture dress on sale online, but you can purchase this dress in black from Couturelab for only £3,063/€3,277/$4,288.

Credit: Wireimage