Everyone knows Barney the Dinosaur. But what you might not know is that several stars got their big break on the beloved children's series.

Since the show's premiere in 1992, Barney & Friends brought smiles to kids all over the world over the course of its almost 20-year-run on PBS. And there singing alongside Barney, B.J. and Baby Bop were some of Hollywood's biggest stars before they became household names, including Selena Gomez, Demi Lovato, Debby Ryan and more.