We can't believe that the cast of Jessie just wrapped filming for Season 4, especially since the actors in the Disney Channel show have completely grown up over the 100-episode span of the series so far. Debby Ryan, Peyton List, Cameron Boyce, Karan Brar, and Skai Jackson were just kids when the show first aired in 2011, and now they've all transformed into totally stylish young actors!
Click through the gallery to see unbelievable then-and-now photos of the cast of from Season 1 and their most recent set party. Then, let us know which actor you think has changed the most by commenting below.
Disney Channel/ ABC Television