"I'm obsessed with my Lycra leggings with a gold side zip from American Apparel -- people stop me on the street and ask me about them. I'll wear them with booties and like a longer, gauzy shirt." - Mad Men costume designer Janie Bryant speaks to The Cut about her more modern sensibilities off-set!

Nylon tricot high-waisted zipper leggings £39 at American Apparel (available in 6 colours including black, white and metallic bronze)