Grump has been played by Arin Hanson considering that the show's debut on July 18, 2012, while Not-So-Grump was initially performed by Jon Jafari till he still left the present on June 25, 2013, at which level he was changed by Leigh Daniel "Danny" Avidan, a.k.a. Game Grumps debut on a Grumpcade replay of BurgerTime.