Reeve found the role offered a suitable challenge because it was a dual role. He said, "there must be some difference stylistically between Clark and Superman. Otherwise, you just have a pair of glasses standing in for a character". Jeff East Jeff East portrays teenage Clark Kent. His lines were overdubbed by Reeve during post-production. "I was not happy about it because the producers never told me what they had in mind", East commented. "It was done without my permission but it turned out to be okay. Chris did a good job but it caused tension between us. We resolved our issues with each other years later." East tore several thigh muscles while performing the stunt of racing alongside the train. It took three to four hours each day to add prosthetic makeup to his face so he resembled Reeve. Brandon Routh Various actors including Jerry O'Connell (who later voiced the DCAMU version of the character), Henry Cavill (who auditioned for J.J Abrams's cancelled 2004 film Superman Flyby and eventually played Clark Kent in the DCEU), Daniel Cudmore (who later played an armored Bizzaro in Superman & Lois), Paul Walker, Will Smith, Josh Hartnett, Matt Bomer, Brendan Fraser, Ashton Kutcher, David Boreanaz, Hayden Christensen, Ian Somerhalder, Jim Caviezel, Jason Behr, Jared Padalecki, and Ryan McPartlin were all considered for the role before Routh was cast. Director Bryan Singer believed only an unknown actor would be suitable for the part of Superman. Brandon Routh was chosen from thousands of candidates interviewed at casting calls in the United States, United Kingdom, Canada and Australia. He had coincidentally auditioned for Clark Kent in the television series Smallville, but lost to Tom Welling. Routh had also met director Joseph "McG" Nichol for the role during pre-production of Superman: Flyby. Dana Reeve, wife of Christopher Reeve, believed Routh's physical resemblance to her late husband was striking. To obtain the muscular physique to play Superman convincingly, Routh underwent a strict bodybuilding exercise regimen. He also opted further in preparation to study Reeve's performance by watching the original film many times and subsequent features behind the scenes as well. Portrayal and characteristics Christopher Reeve first imagined the approach of his role on a flight to London. He felt that in the 1970s, the masculine image had changed and that it was acceptable "for a man to show gentleness and vulnerability". He also felt "that the new Superman