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Robert Downey Jr. Hits Comic-Con

The star hit up the convention to promote his upcoming movie, "Iron Man 3."

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Comic-Con 2012

Comic-Con 2012

Meghan Spencer, dressed as a Twi'lek from the Star Wars movies, walks into the exhibit hall on first day of Comic-Con convention Thursday July 12, 2012, in San Diego. (Denis Poroy/Invision/AP)

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