The Bat is a 1959 American crime-mystery thriller starring Vincent Price and Agnes Moorehead. It is the fourth film adaptation of the story, which began as a 1908 novel The Circular Staircase by Mary Roberts Rinehart, which she later adapted into the 1920 play The Bat. The first film version of the play was the 1926 American silent film The Bat. The film version was adapted by playwright Crane Wilbur, who also directed.

Agnes Robertson Moorehead was an American actress. In a career spanning five decades, her credits included work in radio, stage, film, and television. Moorehead was the recipient of such accolades as a Primetime Emmy Award and two Golden Globe Awards, in addition to nominations for four Academy Awards.