This Doctor Who screencap contains
demoiselle d'honneur and demoiselle d’honneur.
There might also be
robe de dîner, formel, robe de soirée, formelle, robe costume, robe complète, frac, manteau de queue, queues, cravate blanche, cravate blanche et la queue, robe longue, tailcoat, tail coat, tails, cravate blanche et queues, habit, robe pleine, queue de pie, robe de cocktail, and gaine.