Jack Black made his movie debut as part of an 'SNL' spin-off

Before he became a leading man in comedy, Jack Black got his first role in a darkly satirical from Tim Robbins based on a 'Saturday Night Live' sketch.

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Saturday Night Live Jack Black/Neil Young (TV Episode 2005) - IMDb

GABBY Awards: Alternate Oscars, SNL, Movies, etc.: Saturday Night Live Season 27 Reviews - Episode 11 - Jack Black / The Strokes

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Jack Black Shares Thoughts On Why School Of Rock Remains Popular Nearly 20 Years Later

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Jack Black Monologue: Megastardom - Saturday Night Live

Tom Hanks' David S. Pumpkins Returns to 'SNL,' Reveals “Ibiza” Origins – The Hollywood Reporter

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With a new album and show, rockabilly duo Jittery Jack and Amy Griffin are retro-active - The Boston Globe