Mrs. Pollifax–Spy is a 1971 American comedy film directed by Leslie H. Martinson, starring Rosalind Russell, Darren McGavin, and Nehemiah Persoff. It was released by United Artists. Russell wrote the screenplay for the film, which she adapted from the novel The Unexpected Mrs. Pollifax by Dorothy Gilman. Russell used the pen name "C. A. McKnight," which was taken from her mother's maiden name. It was Russell's last role in a theatrically released film.