The cocktail dress Pepper Potts wears when attending the gala at the Disney Hall, where she first dances with Tony Stark, who attends out-of-the-blue, and surprises her. Production noted this hero outfit was worn by Gwyneth Paltrow. A production-made blue silk charmuese vee-neck open-back fishtail train cocktail dress (no sizing available), black satin strappy high heel sandals size 8.5 and a large yellow diamond encrusted silver cocktail ring.