Rex Allen against diamond smugglers down Laredo way
| Actor | Role |
|---|---|
 Rex AllenRex | Rex |
 KokoKoko, Rex's Horse (as Koko the Miracle Horse of the Movies) | Koko, Rex's Horse (as Koko the Miracle Horse of the Movies) |
 Slim PickensSlim | Slim |
 Dona DrakeNarita | Narita |
| MMarjorie LordValerie | Valerie |
 Roy BarcroftCooper | Cooper |
 Judy NugentTaffy Wells | Taffy Wells |
 Percy HeltonJudge Sully | Judge Sully |
 Clayton MooreChip Wells | Chip Wells |
 Zon MurrayJoe, the Fake Deputy | Joe, the Fake Deputy |