Whether she's putting in reps to suit up as a Marvel superhero or crunching equations to play a scientist on Lessons in Chemistry, Brie Larson is the sort of actress who commits to her roles. Her surprise dramatic haircut—a brunette pixie cut, hard-launched on Instagram yesterday—is just the latest proof.

Brie Larson shared new photos of her major hair transformation for her role in Greek tragedy 'Elektra' directed by Daniel Fish, which will mark her debut in London's West End. See her hair new look here.