Oscar-nominated costume designer Jacqueline Durran collaborates with director Joe Wright and actress Keira Knightley for a third time with Anna Karenina, in theaters Nov. 16. (The trio previously worked together on Atonement and Pride & Prejudice.) "It was an ambitious project," she tells PEOPLE of the amazing gowns she created for Knightley. "You never have enough time, and feel like you're always trying to catch up. But I enjoyed it."