Marceline Day (born Marceline Newlin) was an American screen actress who achieved stardom in the mid 1920s, appearing opposite such diverse stars as Harry Langdon, John Barrymore, Ramon Novarro, Lon Chaney, and Buster Keaton. Her career faltered in the early 1930s and she was soon reduced to appearing in low-budget thrillers and action pictures. Day retired in the mid 1930s. She died in 2000.