John Slattery Cast on Arrested Development Season 4

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Filming on Arrested Development Season 4 isn't just underway, so is casting for new characters - and we've got a major one for you:

John Slattery has signed on for a top secret role, according to TV Line, which confirms the Mad Men star will appear on multiple episodes when the beloved sitcom hits Netflix in 2013.

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Might Slattery be a member of the Bluth family? Might television screens across the country simultaneously explode if so?

Sound off now on what role you want to see Slattery take on and on just how ridiculously excited you are for the return of Arrested Development?!?

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.

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