* Frank Sinatra: Playing himself in a fictionalized story about a radio singer.
* Peggy Ryan: Portraying a young woman named Peggy who admires Sinatra.
* Jack Haley: Playing a character named Jack, who is a friend of Sinatra.
* Virginia Grey: Portraying a woman who is a rival of Peggy's affections.
* Donald Meek: Playing the role of a character named "Doc."
The film also featured supporting roles by:
* The Andrews Sisters: Performing musical numbers in the film.
* The Four Step Brothers: A popular vocal quartet that also appeared in the film.
The film's plot revolved around Sinatra's character navigating the world of radio broadcasting, love, and rivalries, while showcasing the musical talents of the cast.