Tonight's going to be a super sad night for Kickin' It: the Disney XD show is airing it's final episode. While the show itself is still going to be awesome, we'll be all emotional over seeing the fun series come to an end after four seasons.
When Kickin' It's first season debuted in 2011, stars like Leo Howard, Olivia Holt, Dylan Riley Snyder and Mateo Arias were so young! And now, they've completely grown up and transformed their styles.
Click through the gallery to see then-and-now pics of the cast since Season 1. Which star do you think has changed the most? Let us know below.