The shot showed Jessica posing with her new fringe while her hairdresser Renato Campora styled her locks.
Renato also shared a snap of the star, writing: "What a greay day to cut bangs on #JessicaChastain @chastainiac #outwithabang".
Jessica before her new fringe
The news of Jessica's new hair 'do comes just days after Vanessa Hudgens debuted her turquoise locks and Kaley Cuoco showed off a pixie crop.
Both actresses took to social networking site Instagram to show off their new tresses.
All the news as Duchess Kate's due date draws close...