Singing cowboy Monte Hale plays "himself" in the Republic western Last Frontier Uprising. Actually, he's not really himself, but a federal agent, dispatched to Texas to buy horses on behalf of the government. Hale runs up against a vicious gang of horse thieves, including such veteran western hard cases as Roy Barcroft and Philip van Zandt. The romantic interest is in the dainty hands of Adrian Booth, who used to go by the name of Lorna Gray. Put together with the standard Republic efficiency, The Last Frontier Uprising benefits from the breathless direction of Lesley Selander.
| Actor | Role |
|---|---|
 Monte HaleMonte Hale | Monte Hale |
 Lorna GrayMary Lou Gardner (as Adrian Booth) | Mary Lou Gardner (as Adrian Booth) |
 Malcolm 'Bud' McTaggartVance Daley (as James Taggart) | Vance Daley (as James Taggart) |
 Roy BarcroftHenchman Boyd Blackwell | Henchman Boyd Blackwell |
 Tom LondonSkillet (Ranch Hand) | Skillet (Ranch Hand) |
 Philip Van ZandtLiberal Lyons | Liberal Lyons |
 Edmund CobbSheriff Hanlon | Sheriff Hanlon |
 John InceSam Chisholm | Sam Chisholm |
 Frank O'ConnorRancher Frank | Rancher Frank |
| RRobert BlairTexan (as Bob Blair) | Texan (as Bob Blair) |
 Doye O'DellRancher | Rancher |
| FFoy WillingSinging Ranch Hand | Singing Ranch Hand |