While promoting his new movie 'The Dark Knight Rises, which hits theaters on July 20th, Joseph Gordon-Levitt is steaming up the cover of the August issue of GQ magazine. In his interview with the mag he chats about things like skipping his high school prom, Hollywood and his dislike for those who put celebrities on a pedestal. Check out some highlights below: On not going to his high school prom: "I thought the girls my age ...