While Gossip Girl fans may have hoped that Blake Lively and Leighton Meester were truly best friends in real life, it turns out that the dynamic between the two stars who played BFFs was very different from the one their characters shared on-screen. "Blake and Leighton were not friends," executive producer Joshua Safran told Vanity Fair. "They were friendly, but they were not friends like Serena and Blair. Yet the second they'd be on set together, it's as if they were."

However, Safran noted that there weren't any major issues between the women, it was simply a matter of being different. "Blake is very much in the moment," he said. "Blake knows what's happening," Safran continued, adding, "You talk to Blake on a very contemporary level, and she would be like, 'I'm doing this thing tonight. Have you been to this restaurant?'" On the other hand, Safran explained that Meester "was very removed and very quiet, and, after her scenes were done, she would wander the stage."

Michelle Trachtenberg, who appeared on the show as Georgina Sparks, told Vanity Fair, "... [W]hen we were filming, there was, 'Leighton hates Blake, Blake hates Leighton...,' and blah, blah, blah." In reality, she said, "We were all chill. It was cool." Makeup artist Amy Tagliamonti backed that up, saying, "I have to say there was too much work to do for things to be that dramatic behind the scenes. ... Everyone was just doing their thing."

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