We just talked to actor Tom Welling, who plays Clarke Kent on Smallville, and asked if Michael Rosenbaum's Lex Luthor will be returning for the final season of the show...

"It's imperative that Lex return for the climax of the series."
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So there you have it folks, Lex Luthor will be back for Smallville 10th and final season. Stay tune for exclusive video interviews with the cast!