Shirley Mason, Leonie Flugrath, (June 6, 1900 – July 27, 1979) was an American actress of the silent era. She and her two sisters Edna and Virginia (Viola Dana) went on to pursue careers in the stage, through the insistence of their mother. Mason made her film debut at the age of 11 in the film The Threshold of Life (1911). As a child actress, she was not in very high demand, and it was not until 1915 that she played her next role in the film Vanity Fair. In 1917, her career saw a major advance as she was cast in thirteen films that year alone, and was given the title role in the movie The Awakening of Ruth. Mason continued a vibrant acting career through the 1920s, landing several major roles. In the 1929 film, The Flying Marine, she appeared in her final role (along with her sister Viola) capping her career at 109 films between the years of 1910 and 1929.