Lively and her "Gossip Girl" costar Leighton Meester reportedly "avoided each other like the plague" while filming. Blake Lively and Leighton Meester as Serena and Blair in "Gossip Girl" season one. Lively played the effortlessly cool, free-spirited Serena Van der Woodson, the foil to Meester's controlling queen bee Blair Waldorf. Blake goes to work, does her job, and goes home," a publicist for Lively said at the time, per Harper's Bazaar. "Because when we were filming, there was, 'Leighton hates Blake, Blake hates Leighton, everyone hates Blake, everyone hates Leighton, everyone hates Chace,' and blah, blah, blah.

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Persons: Lively, Leighton Meester, Blake Lively, Blair, Meester, Serena Van der Woodson, Blair Waldorf, Blake, Leighton, Joshua Safran, Serena, Michelle Trachtenberg, Chace, Chace Crawford, Penn Organizations: Max, CW, Blair Waldorf . New York Magazine Locations: Blair Waldorf .