Disney XD's show Lab Rats has officially finished filming its fourth and final season! Kelli Berglund posted a heartwarming and emotional message on her Instagram account, calling her experience on the show a "roller coaster ride" with "endless love and laughter."
To commemorate the show, we decided to take a look back at the guest stars you totally forgot about. Click through the gallery, then let us know if you remember any of the actors being on the show in the comments below.
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