Bing Crosby had wanted Deanna Durbin to costar in this picture and also in his next vehicle for Paramount, A Connecticut Yankee in King Arthur's Court (1949). Miss Durbin, about to retire from the screen with the finish of her Universal-International contract on August 31, 1949, declined both offers from Bing. In place of Miss Durbin, Universal loaned Ann Blyth to Paramount for the first Crosby picture.
The acronym "IRA" (a common acronym for the Irish Republican Army) can be seen etched into the background over Ann Blyth's right shoulder at about 3 minutes and 55 seconds into the film. A few minutes later, the letters "RA" can be seen over Bing Crosby's right shoulder when he is in the jail. Presumably the "I" is hidden in the latter scene.