When you watch your fave television show and take note of which actors are starring as the main characters, it's hard to imagine them playing anyone else, let alone more a more minor role. But everyone has to start somewhere and before they were the main attraction, these stars were on other TV shows, whether it was for just one episode or a few. They've all come so far!
Click through the gallery to see which guest-starring roles stars had before becoming leads on their respective shows and then drop a comment below telling us which of these guest-starring spots s your fave!
Sabrina Carpenter starred on Austin & Ally before she landed the lead role of Maya in Girl Meets World.