A classic bias-cut dress with diamante detail complements this modern take on the traditional tux. White mousseline gown with Swarovski crystal–encrusted empire waist, $1,400, by Watters Brides. Swarovski crystal earrings, $63; bracelet, $93, both by Swarovski, 800-426-3088. Sterling silver, white-topaz and diamond ring (seen throughout), $1,300, by Stephen Dweck, 212-872-8651. Sterling silver–and-CZ cuff, $1,800, by Jewels-to-Go, 786-566-0521. Leather-and-crystal bag, $575, by Swarovski, 800-426-3088. Sandals (seen throughout), $495, by Bill Blass, 866-278-8222. On him: Black-and-pebble cardigan, $295, by Tse Men. White evening shirt, $165; black bow tie, $60, both by Thomas Pink, 212-838-1928. Black tuxedo pants with cummerbund waistline, about $520, by Moschino Uomo. Optical frames, $240, by John Varvatos, 877-777-9677. 18K white gold–and-black-diamond ring, $3,200, by David Yurman.