Michael Ausiello
January 11, 2009 AT 12:00 PM EST

Someone’s been hiding out at Seattle Grace all these years, and trust me when I say you are never going to believe who it is.

Mommie Dearest — Faye Dunaway!

Sources confirm to me exclusively that the Oscar winner (for Network), who hasn’t taken a small-screen gig since a 2006 episode of CSI, has signed on for at least one episode of Grey’s Anatomy to air in February. She’ll play a renowned doc at the hospital who crosses paths with the Chief, Cristina and Owen.

What do you think? Is this the coolest piece of stunt casting so far this year? Hit me below!

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