Popsugar Fashion Celebrity Fashion Lily James in Blue Hellessy Dress One Look at Lily James's Silky Dress Will Convince You She's a Mermaid 19 February 2018 by Lucy Kenny View On One Page Photo 7 of 13 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 7 Topshop Puff-Sleeve Wrap Dress by Boutique Topshop Puff-Sleeve Wrap Dress by Boutique (£89) Topshop Dresses from ist-track.com Buy Now Previous Next Start Slideshow Celebrity FashionBritish CelebritiesShoppingLily James