Precision marching is less important for the bridal party than maintaining the proper facial expressions: The bridegroom must look awed; the bridesmaids, happy and excited; the father of the bride, proud; and the bride, demure. If the bridegroom feels doubtful, the bridesmaids, sulky, the father, worried, and the bride, blasé, nobody wants to know.

Miss Manners on Weddings (1995)