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In 2007-2008, Ewan McGregor famously portrayed the villainous character Iago in the critically acclaimed production of Shakespeare's "Othello." Iago is a cunning and manipulative antagonist who fuels jealousy and orchestrates the downfall of the protagonist, Othello. McGregor's performance showcased his range as an actor and brought depth and complexity to the character, making it one of his most memorable Shakespearean roles.