Carey Mulligan's monochrome marathon - Telegraph Carey Mulligan, seems to have sworn off colour on her whirlwind promotional tours for 'The Great Gatsby' and 'Inside Llewyn Davis'. Three things we have learnt from Cannes Film Festival 2013 so far. Chopard employees should be more careful with the jewellery entrusted to them; Nicole Kidman needs to keep her lust for her husband in the bedroom and Carey Mulligan has a fear of wearing anything other than monochrome. IN PICTURES: Carey Mulligan's monochrome marathon The 27-year-old actress returned to the red carpet spotlight for The Great Gatsby promo stint with a wardrobe boasting labels including Dior, Victoria Beckham, Lanvin and Prada. The designers fighting to dress Carey, the leading lady in Hollywood's long-awaited blockbuster, had to adhere to one strict rule layed down by her stylist, however. Mulligan only wears black, or white. Save for the red strapless Lanvin dress the actress wore to the world premiere in New York, Carey has used the Gatsby tour, and yesterday's launch of Coen brothers movie Inside Llewyn Davis, to carve out her new signature two-tone style. Favouring tuxedo jackets with cigarette pants; strapless, cinched-waist dresses and jumpsuits, the only flash of colour in Carey's monochrome marathon has been the glint of her Tiffany diamonds. IN PICTURES: Carey Mulligan's style Mulligan is certainly on the money with her monochrome uniform - spring/summer '13 catwalks were salted with the chess piece colour scheme - but how long it will take for the star, who has been known to favour more down-beat, boho looks over sharp, two-tone tailoring in her spare time, remains to be seen. For now though, Carey's style profile is black-and-white. And a stylish one, at that. Take a look at Carey's monochrome marathan in pictures...