The premise meant that Gordon-Levitt took on what he called “the most transformative” role of his career, undergoing three hours of make-up a day to modify his face — especially his lips, nose, and eye-color — to look like a younger Willis. Gordon-Levitt told the WonderCon crowd that he even tried to sound more like Willis, listening to audio from his films, especially the 2005 noir thriller Sin City. On set, Gordon-Levitt said one of his best friends and his mother were both so unnerved by his not-quite-right appearance that they couldn’t spend much time around him. (via)
This explains the Looper poster that unnerved me in the theater last night.