Adam, Blake and Ders as pot-loving best friends who work at a telemarketing company provide enough laughs on their own — but add in a great celebrity cameo and it's Workaholics magic.

Season 6 of the Comedy Central series has featured guest stars such as Dane Cook, Liam Hemsworth and Britney Snow as everyone from an over zealous boss to a catfish victim!

However, let's not forget about the many celebs who've visited Rancho Cucamanga in the past five seasons.

Click through the gallery for a look at the actors you totally forgot guest-starred on Workaholics!