Letter from an Unknown Woman
- År: 1948
- Land: United States of America
- Genre: Drama, Romantik
- Studio: Universal Pictures, Rampart Productions
- Nøgleord: love of one's life, anonymous letter, ignorance, author, duel, vienna, austria, illegitimate son
- Direktør: Max Ophüls
- Cast: Joan Fontaine, Louis Jourdan, Mady Christians, Marcel Journet, Art Smith, Carol Yorke