A Study in Scarlet is a 1933 American pre-Code mystery thriller film directed by Edwin L. Marin and starring Reginald Owen as Sherlock Holmes and Anna May Wong as Mrs. Pyke. The title is taken from Arthur Conan Doyle's 1887 novel of the same name, the first in the Holmes series, but the screenplay by Robert Florey was original.

John Warburton was a British actor who appeared in numerous Hollywood films in the 1930s to 1960s.