In the historical drama film 'The Current War,' Katherine Waterston portrays the character of Marguerite Westinghouse. The movie tells the story of the rivalry between Thomas Edison, played by Benedict Cumberbatch, and George Westinghouse, played by Michael Shannon, as they compete to bring electricity to the United States. Waterston's character, Marguerite, is the wife of George Westinghouse and provides support and insight throughout the film. With its stellar cast and fascinating historical backdrop, 'The Current War' is a must-watch for fans of period dramas.