Mary Marsden Young (June 21, 1879 – June 23, 1971) was an American stage and film actress whose career spanned the first sixty years of the 20th century. She started her career in the theatre and ended playing elderly ladies in film and lastly on television. She and her husband, actor John Craig, had two children, the eldest of whom, Harmon Bushnell Craig, was killed at 22 while serving in World War I. Their other son, John Craig Jr., died in Los Angeles in 1945. Mary Young died at La Jolla, California, on June 23, 1971, aged 92.