Popsugar Fashion Weddings Celebrity Wedding Guests Cara and Poppy Delevingne Hit Their Sister's Wedding in Style February 7, 2014 by Melody Nazarian View On One Page Photo 1 of 18 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 Poppy Delevingne showed off an elegant, long navy dress and a tweed jacket for the occasion. Previous Next Start Slideshow Cameron DiazKate MossJennifer AnistonSienna MillerWeddings