Katherine Agnew MacDonald (December 14, 1891 – June 4, 1956) was an American stage and film actress, film producer, and model. She was born in Pittsburgh, Pennsylvania and was the older sister of actresses Miriam MacDonald and Mary MacLaren.

Starting her career as a popular model in New York City in the 1910s, MacDonald moved to Los Angeles in 1917. She became one of the first women to produce films in Hollywood, and produced nine features for her company, Katherine MacDonald Pictures, from 1919 to 1921.

MacDonald was among the top ranks of actresses financially in 1920, earning about $50,000 per picture from a contract with First National. She achieved the peak of her popularity between 1920 and 1923. From 1922 to 1925 she appeared in films produced by B. P. Schulberg.

Her first significant role was her lead role in Shark Monroe (1918) opposite William S. Hart. She was featured in a number of silent films, including The Squaw Man (1918), Mr. Fix-It (1918), Passion's Playground (1920) and The Infidel (1922). Her films typically were romantic dramas. MacDonald made only two pictures after 1923, one each in 1925 and 1926. (Wikipedia)