Did you know this mind blowing fact about Joseph Gordon-Levitt?

For the past few years I had know Idea where Joseph Gordon-Levitt came from. I mean he just appeared on the scene as a celebrity A lister appearing in such films as Inception, 500 days of summer, Premium Rush, Looper, and The Dark Night Rises. Everyone seems to love this kid and I don't know why, but then I saw something on tv and I my mind was blown. JOSEPH GORDON-LEVITT WAS THE KID FROM "3rd ROCK FROM THE SUN"!!! I can't fucking believe it. I really think John Lithgow should have let me know. Did you know about this fascinating factoid?