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See some of Hollywood&#39;s biggest stars before they became household names. How many do you recognize?

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Michael Cassidy is an American film and television actor. He is best known for his role as Zach Stevens on The O.C. and as Tyler Mitchell on the TBS comedy Men at Work. He portrayed Jonathan Walsh on comedy People of Earth from the show's start in 2016 until its 2018 cancellation.

Keep Your Pantheon by David Mamet, role of Philius directed by Neil Pepe at The Atlantic Theater Fall 2009

Keep Your Pantheon by David Mamet, directed by Neil Pepe at the Center Theatre Group

Other works

Michael Cassidy

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