Mario Lanza (Enrico Caruso)
Ann Blyth (Dorothy Benjamin)
Dorothy Kirsten (Louise Heggar)
Jarmila Novotna (Maria Selka)
Richard Hageman (Carlo Santi)
Gilbert Russell (Opera Singer)
Bert Roach (Technician)
Edith Angold (Hilda)
Matt Moore (Max)
Maurice Samuels (Papa Gino)
Blanche Thebom (Opera Montage)
Minerva Urecal (Carmencita Toscano)
Giuseppe Valdengo (Opera Montage)
Tito Vuolo (Pietro Toscano)
Charles Evans (Finch, Benjamin Butler)
Pal Javor (Antonio Scotti)
Silvio Minciotti (Actor/Actress)
Mae Clarke (Woman)
Yvette Dugay (Musetta Barretto)
Teresa Celli (Opera Montage)
Argentina Brunetti (Mrs. Barretto)
John Hamilton (Foster DeWitt)
Paul Harvey (Benefit Spokesman)
Sherry Jackson (Musetta as a Child)
Peter Brocco (Father Bronzetti)
Robert Bright (Actor/Actress)
Marina Koshetz (Opera Montage)
David Bond (Father Angelico)
Carl Milletaire (Gino)
Shepard Menken (Fucito)
Vincent Renno (Tullio)
Nestor Paiva (Egisto Barretto)
Peter Edward Price (Caruso, as a boy)
Mario Siletti (Papa Caruso)
Angela Clarke (Mama Caruso)
Ian Wolfe (Hutchins)
Carl Benton Reid (Park Benjamin)
Eduard Franz (Giulio Gatti-Casazza)
Ludwig Donath (Alfredo Brazzi)
Alan Napier (Jean de Reszke)