Millie Bobby Brown was filming for the upcoming movie The Electric State on Thursday.The 18-year-old actress donned oversized denim overalls and sported long, blonde hair while filming a scene for the upcoming sci-fi adventure film in Atlanta, Georgia.In her latest project, the Stranger Things star - who previously set a record for the largest upfront salary paid to an actor under the age of 20 - plays an orphaned teenager who journeys across the American West in search of her younger brother.