Vergara, 43, is gearing up for her approaching wedding to actor Joe Manganiello, reported Us Weekly.
Zuhair previously designed Vergara's dress for Oscar and Golden Globe parties.
The actress looked gorgeous in some sequinned dresses designed by Zuhair in the past. For the upcoming nuptials, Vergara will wear a custom-made, fairy-tale frock. Other details about the dress haven't been revealed yet.
Vergara and Manganiello were engaged in Hawaii in December last year. The couple will marry at Florida's Breakers resort in Palm Beach on November 22.