The Thirteenth Guest is a 1932 American pre-Code mystery comedy thriller film, released on August 9, 1932. The film is also known as Lady Beware in the United Kingdom. It is based on the 1929 novel The Thirteenth Guest written by crime fiction author Armitage Trail, best known for the novel Scarface on which the 1932 movie of the same name was based. The novel was filmed again in 1943 as Mystery of the 13th Guest.