This may be hard to believe, but it’s officially been nine years since the TV show Kickin’ It premiered. Yep, the hilarious Disney XD series aired its first episode on June 13, 2011, and it’s seriously shocking how fast time has flown by! It feels like just yesterday viewers were watching  Olivia HoltDylan Riley SnyderLeo HowardMateo AriasJason Earles and Alex Jones on their TV screens, and there’s not a day that goes by that fans don’t miss it, TBH.

Fans may not know this, but there were actually a ton of celebrity guest stars throughout the four seasons that the show aired. Yep, stars like Kat McNamara, Austin North, Jack Griffo, Roshon Fegan, Booboo Stewart, Billy Unger, Kelli Berglund and more made appearances on the show long before they were famous! Wow, who knew?

They’re not the only ones… Scroll through our gallery to uncover all the stars you totally forgot guest starred in Kickin’ It.

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