The Mystery of Marie Roget is a 1942 mystery film starring Patric Knowles. The story was adapted from the short story "The Mystery of Marie Rogêt" written by Edgar Allan Poe in 1842. The film, directed by Phil Rosen and produced by Universal Pictures, is set in 1889.

Patric Knowles, born Reginald Lawrence Knowles, was an English film actor. Born in Horsforth, West Riding of Yorkshire, he later changed his name to reflect his Irish heritage. He made his film debut in 1932, and played either first or second film leads throughout his career. He appeared in films from the 1930s to the 1970s.