Christina Ricci has been tapped to guest star on the special episode of ABC's sophomore hit "Grey's Anatomy" that is slated to air Feb. 5 after the network's broadcast of Super Bowl XL. The plot for the episode of the medical drama, from creator/executive producer Shonda Rhimes and Touchstone Television, is being kept under wraps. Ricci's rare TV series credits include a recurring role on Fox's "Ally McBeal" and a guest shot on NBC's comedy "Joey" last season, in which she played Joey Tribbiani's sister.

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