Maisie Ravier is a popular fictional character, the star of ten films (1939–1947) and of a radio show, The Adventures of Maisie (broadcast 1945–1947, 1949–1953). She was played by actress Ann Sothern (1909–2001).
After a string of other films had failed to attract an audience, Sothern left RKO Radio Pictures and signed with Metro-Goldwyn-Mayer, making her first film for MGM in 1939. Sothern was cast in Maisie, as brassy but kindhearted Brooklyn burlesque dancer Mary Anastasia O'Connor, who also goes by the stage name "Maisie Ravier".
After years of trying, Sothern had her first real success, and a string of "Maisie" comedy sequels followed, beginning with Congo Maisie (1940) and continuing until Undercover Maisie (1947). Reviewing Swing Shift Maisie (1943), Time praised Sothern and described her as "one of the smartest comediennes in the business".
On November 24, 1941, Sothern appeared in the Lux Radio Theater adaptation of Maisie Was a Lady, and the popularity of the film series led to her own radio program, The Adventures of Maisie, broadcast on CBS Radio from 1945 to 1947, on the Mutual Broadcasting System in 1952, and in syndication from 1949 to 1953.