Joseph Gordon-Levitt's roles in "Inception" and "500 Days of Summer" make it easy to forget that he started his career on television. Gordon-Levitt starred as Tommy Solomon in the sitcom "3rd Rock from the Sun" for years, but his first acting role came much earlier. At age 7, he played Rounder in a made-for-television movie called "Stranger on My Land." —XFINITY Entertainment Staff (Photos by Getty Images, Taft Entertainment Television)
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