A signature of ’40s style, the cowl neckline makes a magnificent return on this silk-charmeuse gown featuring a V-shaped back, a crystal-beaded waistband, and a modified A-line skirt with a chapel train. Jim Hjelm Bridal, 800-686-7880, about $2,530. Hair comb, Laura Jayne Bridal Design. Necklace and bracelet, R.J. Graziano, 212-685-1248. His tuxedo, After Six. Shirt and tie, Thomas Pink.