Although Sweet Rosie O'Grady is set in the past and that might not make it apparent at first, the film is a remake of the Tyrone Power-Don Ameche-Loretta Young classic Love Is News. Set in the gaslight era of the 1880s it's the same plot involving an actress instead of an heiress.
The actress is Betty Grable who has just scored a big triumph on the London stage and is the toast of two continents. She's also about to marry a title in the person of Reginald Gardiner, but she's gotten wind that that notorious scandal sheet, the Police Gazette has uncovered her past as a burlesque queen. The reporter with the nose for news is Robert Young and his editor is Adolphe Menjou.
If you've seen Love Is News and That Wonderful Urge than you know exactly how this will all end up. But along the way with several musical numbers you'll see Betty Grable probably at the height of her career when she and Rita Hayworth vied to be the GI's number one pin-up girl of the barracks.
Harry Warren and Mack Gordon wrote a beautiful ballad My Heart Tells Me which Betty and Phil Regan sing during the film. Sadly Darryl Zanuck banned her from a commercial recording so others made hit records and money off the song she introduced. Robert Young got to sing the title song and he was not going to be a threat to Bing Crosby or that new singer from Hoboken that was coming up at the time.
The film was significant in another way for Betty Grable. During the production it was shut down for a bit when Betty ran off and married Harry James. Apparently that was cause for great happiness, even Darryl Zanuck didn't mind the production delay.
If you're a Betty Grable fan Sweet Rosie O'Grady is an absolute must.