Brittany Snow and Andrew McCarthy officially sign on to new Gossip Girl spin-off while rumors fly about Losts Cynthia Watros filling the shoes of the Rhodes family matriach. Just think: McCarthy, or as we fondly remember him, the lovable yet overly prepster Blane, as Serena's grandpop and Miss "I got fired because of my Hawaii DUI" Watros as her nanna? Too good.
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