The name Ub Iwerks will forever be tied to Walt Disney. After all, it was Iwerks who animated virtually every frame of the very first Mickey Mouse cartoon, "Plane Crazy" (1928). And years later, it was Iwerks who developed the technology that allowed for the combination of animation and live-action in Disney classics such as The Three Caballeros, Song of the South, and Mary Poppins. In fact, Iwerks won two Academy Awards for his work with Disney.