1. To get Jessica Chastain's hairstyle, spray a root-lifting serum at the roots of your hair and then layer on a dollop of leave-in conditioner with heat protection.
2. Blow dry your hair with a round brush for added volume.
3. Create a side part, and then separate a 3 to 4-inch section of hair from the front of your head.
4. Braid the section beginning at your part, then secure it loosely near your ear. Finish by misting all over with a shine serum.
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