Emerald Fennell's version of Wuthering Heights premiered in LA last night, and Margot Robbie completely stole the show. Margot recently explained that in the movie, Cathy only wears black, red or white, and she's taking to the red carpets, too. For the world premiere, she chose a dramatic corseted gown by Schiaparelli with a black lace bodice and a black and red ombre effect skirt. But it was her jewellery that really had people talking - that necklace has got a whole lot of history...(Image credit: Getty Images)It's the Cartier Taj Mahal necklace, made from gold, rubies, jade and diamonds, and featuring a heart-shaped pendant. When Elizabeth Taylor wore the necklace, she styled it as a pendant, whereas Margot wore hers with a drop down the back to give it a modern feel.