Mario Lanza as Enrico Caruso

Ann Blyth as Dorothy Benjamin

Dorothy Kirsten as Louise Heggar

Jarmila Novotná as Maria Selka

Richard Hageman as Carlo Santi

Carl Benton Reid as Park Benjamin

Eduard Franz as Giulio Gatti-Casazza

Ludwig Donath as Alfredo Brazzi

Alan Napier as Jean de Reszke

Blanche Thebom as Vocalist - Opera Montage

Teresa Celli as Vocalist - Opera Montage

Nicola Moscona as Vocalist - Opera Montage

Giuseppe Valdengo as Vocalist - Opera Montage

Lucine Amara as Vocalist - Opera Montage

Marina Koshetz as Vocalist - Opera Montage

George Chakiris as Dancer (uncredited)

Mae Clarke as Woman (uncredited)

Bess Flowers as Front Row Audience Member at 'Lucia di Lammermoor' (uncredited)

William Ripley Dorr as Vocal Ensemble (uncredited)

Nestor Paiva as Egisto Barretto

Hazel Dohlman as Dowager (uncredited)

Pál Jávor as Antonio Scotti

Carl Milletaire as Gino

Shepard Menken as Fucito

Vincent Renno as Tullio

Peter Price as Caruso (as boy)

Mario Siletti as Papa Caruso

Angela Clarke as Mama Caruso

Ian Wolfe as Hutchins

Yvette Duguay as Musetta Barretto

Argentina Brunetti as Mrs. Barretto