At a London film premiere on Thursday evening, the Duchess of Cambridge (shown left) - whose Kensington Palace home is next door to Tamara Eccelstone's 57-room mansion - inadvertently copied the heiress by wearing a £320 white gown made by emerging designer Self Portrait. Tamara (shown middle) wore the same dress for an Evening Standard photoshoot in June, as my picture shows, while American socialite Paris Hilton has also sported the gown. Paris, 35, first wore the £320 pleated crochet floral maxi dress - which features a prominent slit in its long flowing pleated skirt - to the amfAR Inspiration Gala in Los Angeles (pictured right). Other features of the dress include a modest high neckline countered by an intricate lace bodice.