Joseph Gordon-Levitt is taking on the role of playing a younger Bruce Willis in the upcoming Action/Sci-Fi "Loopers" set for release September 28th. The use of prosthetics in this film are incredible, they have made Levitt look like Willis as well as they can. Levitt is one of the best actors around in my opinion I have enjoyed the majority of his films I've seen. He has a wide range of acting an there isn't a role of his I don't think he has pulled off.
"In a futuristic gangland, a killer (Gordon-Levitt) works for a mob in the year 2042 and kills people who are sent from the year 2072. He recognises one victim (Willis) as himself and hesitates, resulting in the escape of his older self."