It would be easy to assume that Hendricks loves the iconic hair style of her Mad Men character Joan, given how she's had to stick with it for the show's 7-year run so far. However, Hendricks in fact isn't a fan of Joan's permanently worn-up do, saying, "One thing I tried for years and was told no every time was I wanted her to have her hair down. And my boss said, 'Women find a style they like and they stick to it', and I went, 'That's the craziest thing, my girlfriends and I are changing our colours and cuts all the time'". Apparently preparing Joan's hair for the show takes approximately three hours, and the make-up department was militant about ensuring the style was consistent throughout episodes. Hendricks said, "There was very little wiggle room - they watched my hair like a hawk. I heard there was a threat at one point that if I kept asking to put my hair down, they were just going to chop it off.'' Who knows? With the show's series finale airing in a few short weeks, perhaps the last episode will see Joan let her hair down once and for all.