Day died of natural causes Saturday at her daughter's home in Utah , where she moved following the death of her husband of 47 years, producer Michel M. Grilikhes, earlier this year, said publicist Dale Olson.
Day starred opposite Joel McRea in 1940's "Foreign Correspondent" and also appeared in such films as "Mr. Lucky," "I Take This Woman," "The Story of Dr. Wassell," "My Dear Secretary" and "The High and the Mighty." She appeared in her last movie, "The Third Voice" in l960, the year she married Grilikhes.
During a break in her film career, Day co-starred on a national theater tour with Gregory Peck in " Angel Street ," and also took the stage in "Lost Horizon," "The Women" and "Time of the Cuckoo."
In 1951, Day became one of U.S. television's first female talk show hosts in "The Laraine Day Show."
Day penned the memoir "Day With Giants" in 1951 about life with baseball manager Leo Durocher, to whom she was married from 1947 to 1960, a period in which she was sometimes called "The First Lady of Baseball."
Day's first husband was singer Ray Hendricks.
Day made her film debut in a bit part in "Stella Dallas" in 1937. She changed her birth name and first won fame as Nurse Mary Lamont in the film series "Dr. Kildare," starring Lew Ayres.
Day is survived by her twin brother, three daughters, a son and numerous grandchildren.