We never thought we'd see the day Jessica Chastain was without her signature auburn tone, but considering that 2016 has been one hell of an unpredictable year, anything's possible. Earlier today, the star was spotted on the set of her upcoming film Molly's Game, working a much darker hue than usual. Chastain has previously played around with her length, but aside from the blonde wig she wore in The Help, that red hair has long been her trademark. We're not sure if her brunette hair is the real deal or not, but she's serving some serious #HairInspo either way. Check out her new 'do below, and see even more celebrity hair makeovers in our gallery.