Actin Up. Darren L. Miller AKA (Actin Up) there’s nothing Low key about this MC/Actor once know as Money one. One day he got in some trouble with his older brothers and his mother asked who started it and his brother said Darren did so his mother said boy you always Actin up I’m just gonna call you Actin up from now on, thus creating the name Actin Up. Soon as he Graced the Silver Screen with his presence he knew he was (Acting up) .