In Sing a Jingle, Allan Jones plays popular radio crooner Roy King, who goes to work in a war plant after being declared 4F. He falls in love with Muriel Crane, the boss' daughter, who is at first unaware of the fact that King is the heartthrob of millions (he's gotten the job under an assumed name).
| Actor | Role |
|---|---|
 Allan JonesRay King | Ray King |
 June VincentMuriel Crane | Muriel Crane |
 Samuel S. HindsJ.P. Crane | J.P. Crane |
| GGus SchillingBucky | Bucky |
 Betty KeanMyrtle | Myrtle |
| JJerome CowanAndrews | Andrews |
 Edward NorrisAbbott | Abbott |
 Joan CastleVera Grant | Vera Grant |
| DDickie LoveWilbur Crane | Wilbur Crane |
 Vivian AustinAnn | Ann |
 William NewellWiggins | Wiggins |
| DDean CollinsBenny | Benny |