Some of Hollywood’s most well-known celebs dazzled spectators with their designer robes and tuxes. NEW YORK — Jessica Chastain strike the Oscars crimson carpet in a purple and copper sparkle robe, when the 15-calendar year-old Saniyya Sidney twirled and beamed in a floral-adorned princess search and her “King Richard” castmate Demi Singleton lit up in smooth purple Sunday. Chastain’s Gucci ombre glance incorporated a ruffle hem. The colour of her hair, in a higher ponytail, matched the burnished bodice of her robe perfectly. Nicole Kidman smooched with her partner, Keith City, in a subdued blue gray Armani Prive strapless column robe with a waist ruffle and teach. “This gown, they…