Ezra Miller landed the role of a lifetime as Barry Allen/The Flas in the DC Extended universe. The young actor spend months filming Zack Synder's Justice League movie, and will soon start work on the Flash's solo film. In a recent interview, Miller shared how helpful Geoff Johns has been as a resource for The Flash. Johns is resident of DC Entertainment and chief creative officer of DC Comics. Miller sang his praises, and said: "you pretty much can?t get someone with a deeper knowledge of this universe than Geoff Johns."