From Wikipedia, the free encyclopedia: Mary Treen (born Mary Louise Summers, March 27, 1907 – July 20, 1989) was an American film and television actress, a familiar face who brought levity to the screen. A minor actress for much of her career, she managed to secure a plain, unassuming niche for herself in the Hollywood of the 1940s, 1950s, and 1960s. Early years She was born in St. Louis, Missouri, the daughter of attorney Don. C. Summers and actress Helene Sullivan Summers. In 1908, when Mary Louise was 11 months old, her mother sued her father for divorce on the grounds that he failed to provide for her. Her father died while she was an infant. She was reared in California by her mother and her stepfather, a physician. Treen attended the Westlake School for Girls and a convent where she tried out successfully in school plays. Caree...