In Philadelphia, soprano Prudence Budell returns from Europe after five years of training at the best European music schools. Her wealthy grandmother, Abigail Trent Budell, sponsors an opera company led by the famous maestro Jose Iturbi to give Prudence a chance to star in an opera. They hire renowned tenor Guido Russino Betelli, but Prudence does not feel comfortable performing with him. When Prudence accidentally hears American-Italian truck driver Johnny Donnetti singing opera, she persuades Jose Iturbi to give Johnny an opportunity. As Prudence and Johnny fall in love, a misunderstanding ensues when Prudence believes Johnny has feelings for his colleague Mary after seeing them together at his workplace. Cast: - Kathryn Grayson as Prudence Budell - José Iturbi as José Iturbi - Ethel Barrymore as Abigail Trent Budell - Mario Lanza as Johnny Donnetti - Keenan Wynn as Artie Geoffrey Glenson - J. Carrol Naish as Papa Donnetti - Jules Munshin as Michael Pemberton - Thomas Gomez as Guido Russino Betelli - Marjorie Reynolds as Mary - Arthur Treacher as Hutchins - Mimi Aguglia as Mamma Donnetti - Amparo Iturbi as Amparo Iturbi - Bridget Carr as Donna Donnetti - Amparo Ballester as Rosina Donnetti - Ann Codee as Mme. Bouget Runtime: 96 minutes