The story tells of a princess from a faraway land who comes to the United States of America and falls in love with a West Point Lieutenant.

Directed by William Anthony McGuire, the cast starred Marilyn Miller as the princess, Frank Morgan as her father, King Cyril, Bobbe Arnst (Mary), Margaret Dale (the Queen), and Jack Donahue.

[3] Rosalie was performed in many regional theatres, including the Paper Mill Playhouse, Millburn, New Jersey in 1946 and 1948, and the St. Louis Municipal Opera (The Muny) six times between 1938 and 1960.

The New York Times reviewer noted that, without its "lavish spectacle", the musical is "the giddiest of period operetta confections, buoyed by half a dozen memorable tunes."

King Cyril reluctantly goes to visit America to obtain a loan for his troubled country, accompanied by his daughter Princess Rosalie and the Queen.

MGM's top tap dancer at the time, Eleanor Powell, was cast as the princess opposite Nelson Eddy as Dick Thorpe (Lieutenant Fay in the musical).

Also appearing in the film were Ray Bolger (Bill), Edna May Oliver (the Queen), Ilona Massey (Brenda) and Reginald Owen (Chancellor).

[6] The reviewer at allmovie.com called the film an "overproduced musical extravaganza", and noted that "The flimsy plot all but collapses under the weight of Gibbons' enormous sets and dance director David Gould's ditto choreography.