Christian Bale was cast as Batman shortly after he completed filming on "The Machinist." Bale dropped nearly 60 pounds for the part of a psychologically tortured man and weighed only 120 pounds at the time. He underwent a breakneck weight routine over the course of 4 months and gained almost 100 pounds in muscle. His routine was too successful, however, and Christopher Nolan was concerned Bale looked too bulky to be the agile Batman at 220 pound. Bale scaled back to around 190 pounds for the rest of the shoot, but not before crew members jokingly dubbed him "Fatman."