What Every Woman Knows
- Sal: 1934
- Welat: United States of America
- Genre: Comedy
- Studio: Metro-Goldwyn-Mayer
- Keyword: sibling relationship, wife, election campaign, marriage crisis, scotland, arranged marriage, ambition, based on play or musical, countess, agreement, member of parliament, other woman, loyal wife, political aspiration, engagement contract, young scholar, woman behind the man, mismatched couple, financial backer, protective brothers
- Serek: Gregory La Cava
- Avdan: Helen Hayes, Brian Aherne, Madge Evans, Lucile Watson, Dudley Digges, Donald Crisp