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For most kids growing up in the early '90s, The Wonder Years was a formative show, and the same is true for a lot of child actors looking to jumpstart a career during that time too. Go back and re-watch Kevin Arnold's glory days and you'll see some familiar faces. Of course, if don't have the time to sit through 115 episodes, you could just click through and see all the now famous actors who were just background players during The Wonder Years' five-year run.