January Jones Goes Brunette: See All the Mad Men Star’s Hair Colors (PHOTOS)

Is she trying to take a page out of Christina Hendricks’s book here? Mad Men’s Joan would be totally put out if another woman in her circle copied her hair color. We’re not loving this look as much, but we do think that with red hair and those aviators, January is a spitting image of Jessica Chastain in that movie Zero Dark Thirty.