The day has come that one of our fave Disney XD shows, Lab Rats, has completed filming its final episode. The series' stars Kelli Berglund, Billy Unger, Tyrel Jackson Williams and Spencer Boldman have grown up right before our eyes and playing bionic siblings on TV has naturally led them to become like family IRL.
Kelli took to Instagram to share just how bittersweet the ending of filming has been for her and the rest of the cast, writing that journey "has been roller coaster ride, but the endless love and laughter has made it worth it." As much as they are all going to miss the show —just like we are— they know they are all going to still be the best of friends, which is all types of adorable.
In honor of this occasion, we are taking a look back at just how much these stylish stars have changed throughout the last four years. Click through the gallery to see the pics of the cast and then tell us in the comments what you'll miss most about the show.