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Child Stars: Then and Now

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THEN: Neil Patrick Harris

A genius teenage doctor who typed his thoughts into a computer and had a best friend named Vinny? It doesn't sound like a hit, but "Doogie Howser, M.D.," starring Neil Patrick Harris, was a huge success. —XFINITY Entertainment Staff (Photo by ABC)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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