Mary Pickford was one of the earliest film stars and helped establish the new film industry in America. She began her career in the early 1900s acting in films for D.W. Griffith's Biograph Company. By the 1910s, she was one of the most popular actresses in the world and was known as "America's Sweetheart." She expanded acceptable behaviors for women on screen, portraying youthful and energetic roles. Off screen, Pickford was a savvy businesswoman and helped form United Artists studio with Charlie Chaplin, Douglas Fairbanks, and D.W. Griffith. She remained one of the highest paid stars of her time and a prominent figure in the film industry.