- HD 1080
- Runtime: 119m.
- Status: Released
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- Languages: en
- Country: United States of America
- Director: George Sidney
- Stars: Walter Pidgeon, Ethel Barrymore, Peter Lawford, Angela Lansbury, Janet Leigh
- keywords: kgb, colonel, vienna, austria, convent (nunnery), ballerina
- Production_studio: Metro-Goldwyn-Mayer
- Slogan: Beautiful Maria...the four lives that touched hers were never the same again!
- The The Red Danube is featured in the top rankings of 1949
- #30 in Top Romance Movies of 1949
- #76 in Top Drama Movies of 1949
- #11 in Top War Movies of 1949
A Russian ballerina in Vienna tries to flee KGB agents and defect.