Have you ever watched an old episode of one of your favorite shows like Zoey 101 and spotted a major celebrity guest star? It's crazy how many celebs actually started their careers with small parts on Nickelodeon or Disney shows!

Click through to see 10 celebrities who guest starred on Zoey101 before they were famous, then let us know in comments below if you remember any of the roles. Did you realize so many of your faves were on the show?