Here's a Gossip Girl spoiler, courtesy of Entertainment Weekly:

Gossip Girl will finally reveal the identity of Blair Waldorf's (Leighton Meester) absentee father, who left her mommy for a male model: He'll be played by John Shea, who's best known for playing Lex Luthor on Lois & Clark: The New Adventures of Superman.

Shea will appear in the episode entitled Roman Holiday on Nov. 21

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