Mary MacLaren (born Mary Ida MacDonald, also credited Mary McLaren; January 19, 1900 – November 9, 1985) was an American film actress in both the silent and sound eras. She was the younger sister of actresses Miriam and Katherine MacDonald and appeared in more than 170 films between 1916 and 1949. MacLaren's screen career began in 1916 with Shoes. She subsequently performed in productions for the Universal Film Manufacturing Company, including Idle Wives (1916), The Plow Woman (1917), The Model's Confession (1918), The Petal on the Current (1919), The Unpainted Woman (1919), Bonnie Bonnie Lassie (1919), Rouge and Riches (1920), and many others. Among her more notable film roles is her performance as Queen Anne of Austria in the 1921 Douglas Fairbanks production of The Three Musketeers.