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Haley Joel Osment will be in the Entourage movie in a supporting role. He joins Jeremy Piven, Billy Bob Thornton, Adrian Grenier, Kevin Dillon, Jerry Ferrara, and Kid Cudi as Ari's new assistant.

Image Source: Getty / Gregg DeGuire
Read More Haley Joel OsmentJai CourtneyMovie CastingMoviesMeryl StreepTina Fey
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