Willa Sibert Cather (December 7, 1873 - April 24, 1947) was an American writer who achieved recognition for her novels of frontier life on the Great Plains, including O Pioneers! (1913), The Song of the Lark (1915), and My Ántonia (1918). In 1923 she was awarded the Pulitzer Prize for One of Ours (1922), a novel set during World War I.

While Cather enjoyed the novels of George Eliot, the Brontës, and Jane Austen, she regarded most women writers with disdain, judging them overly sentimental and mawkish. Cather admired Henry James as a "mighty master of language and keen student of human actions and motives." She generally preferred past literary masters to contemporary writers. Some particular favorites were Dickens, Thackeray, Emerson, Hawthorne, Balzac, Flaubert, and Tolstoy. Although Cather began her writing career as a journalist, she made a distinction between journalism, which she saw as being primarily informative, and literature, which she saw as an art form. Cather's work is often marked by its nostalgic tone, her subject matter and themes drawn from memories of her early years on the American plains.

Cather graduated from the University of Nebraska-Lincoln. She lived and worked in Pittsburgh for ten years, supporting herself as a magazine editor and high school English teacher. At the age of 33 she moved to New York City, her primary home for the rest of her life, though she also traveled widely and spent considerable time at her summer residence on Grand Manan Island, New Brunswick.