<Table> <Tr> <Th_colspan="2"> Blair Waldorf </Th> </Tr> <Tr> <Td_colspan="2"> Gossip Girl character </Td> </Tr> <Tr> <Td_colspan="2"> Blair as portrayed on the cover of It Had To Be You </Td> </Tr> <Tr> <Th> First appearance </Th> <Td> Novel: Gossip Girl Television: "Pilot" (episode 1.01) </Td> </Tr> <Tr> <Th> Last appearance </Th> <Td> Novel: I Will Always Love You Television: "New York, I Love You XOXO" (episode 6.10) </Td> </Tr> <Tr> <Th> Created by </Th> <Td> Character Cecily von Ziegesar Television producers Josh Schwartz Stephanie Savage </Td> </Tr> <Tr> <Th> Portrayed by </Th> <Td> Leighton Meester </Td> </Tr> <Tr> <Th_colspan="2"> Information </Th> </Tr> <Tr> <Th> Full name </Th> <Td> Blair Cornelia Waldorf </Td> </Tr> <Tr> <Th> Aliases </Th> <Td> B, Queen B </Td> </Tr> <Tr> <Th> Title </Th> <Td> Television: Princess Blair of Monaco (during her marriage to Louis) </Td> </Tr> <Tr> <Th> Family </Th> <Td> Harold and Eleanor Waldorf (parents) Cyrus Rose (stepfather) Aaron Rose (stepbrother) Novels: Tyler Waldorf (younger brother) Ying and Yang Waldorf (adoptive sister and brother) Yale Waldorf - Rose (half - sister) </Td> </Tr> <Tr> <Th> Spouse (s) </Th> <Td> Television: Prince Louis Grimaldi (ex-husband) Charles "Chuck" Bass (husband) </Td> </Tr> <Tr> <Th> Children </Th> <Td> Television: Henry Bass (son, with Chuck; flash - forward) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Blair Waldorf </Th> </Tr>

Who is the father of blair's baby
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