Sidewalks of London, also known as St Martin's Lane, London After Dark, and Partners of the Night, is a 1938 British black-and-white comedy drama starring Charles Laughton as a busker or street entertainer who teams up with a talented pickpocket, played by Vivien Leigh. The film co-stars Rex Harrison and Tyrone Guthrie in a rare acting appearance. It also features Ronald Shiner as the barman (uncredited). It was produced by Mayflower Pictures Corporation.

Charles Laughton was a British-American actor. He was trained in London at the Royal Academy of Dramatic Art and first appeared professionally on the stage in 1926. In 1927, he was cast in a play with his future wife Elsa Lanchester, with whom he lived and worked until his death.