This Emilia Clarke photo contains
demoiselle d'honneur and demoiselle d’honneur.
There might also be
robe, robe de dîner, formel, robe de soirée, formelle, and robe.
@Lionsgate films -Above Suspicion – Available in Select Theaters and Everywhere toi Rent films on May 14th; on Blu-ray and DVD May 18th! – Emilia Clarke, Jack Huston