It might surprise you that Darren Arnofsky, best known for the macho film The Wrestler, is making a film about the intense rivalry between two ballet dancers. But what's ballet without costumes? Black Swan, which comes out December 3rd, features the costume designs of Amy Westcott (The Wrestler, Entourage, The Squid and the Whale) and the Mulleavy sisters, better known as Rodarte. In an interview at The Ballet Bag, Westcott gives a great account of trying to enter the ballerinas' world, watching classes, going to performances, and taking copious notes. It's always interesting to hear how costume designers (and, in their own way, fashion designers) balance their vision with how the world actually is.