All that matters is what size the keg is. Shouldn't matter if it is Coors, Pabst, Miller, etc. This kegerator fits up to a 1/2 barrel keg (15.5gal).
If you get a 1/2 barrel keg and fill it with Miller Lite, it will fit into the Kegerator, but the Kegerator will disapprove of your beer choice, as will anybody with any self-respect.