The story of Tommy and Jimmy Dorsey from their boyhood in Pennsylvania through their rise, their breakup, and their personal reunion.
| Actor | Role |
|---|---|
 Tommy DorseyTommy Dorsey | Tommy Dorsey |
 Jimmy DorseyJimmy Dorsey | Jimmy Dorsey |
 Janet BlairJane Howard | Jane Howard |
 Paul WhitemanPaul Whiteman | Paul Whiteman |
 William LundiganBob Burton | Bob Burton |
 Sara AllgoodMrs. Dorsey | Mrs. Dorsey |
 Dave WillockFoggy | Foggy |
 Arthur ShieldsThomas Dorsey Sr. | Thomas Dorsey Sr. |
 William BakewellEddie | Eddie |
 Art TatumArt Tatum | Art Tatum |
 Tom DuganWaiter (uncredited) | Waiter (uncredited) |
 Bess FlowersAudience Lady (uncredited) | Audience Lady (uncredited) |