The Beagle Boys are a group of fictional characters from the Scrooge McDuck universe. Created by Carl Barks, they are a gang of criminals who constantly try to rob Scrooge McDuck. Their introduction and first appearance was in Terror of the Beagle Boys, in Walt Disney's Comics and Stories #134, although in this story they only appear in the last frame and have no lines. They appear again in the next issue in a similar fashion, in The Big Bin on Killmotor Hill. They later get a more prominent role in the story Only a Poor Old Man and has become major characters in the Disney comics ever since.
The Beagle Boys were originally created by Carl Barks, and made their first appearance in the 10-page story The Terror of the Beagle Boys (WDC #134) that was first published in November 1951. Although the Beagle Boys are only shown very briefly on the last page of this story, it is implied that Scrooge has known about them for a long time. The first story to feature the Beagle Boys in a major role is Only a Poor Old Man from March 1952, which serves as a template for virtually all future Beagle Boys appearances, and establishes them as a serious threat to Scrooge's fortune.