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Leighton Meester and Sebastian Stan

On Gossip Girl, Carter Baizen romances both Blair and Serena, but he has more of a legitimate relationship with Serena. However, the real-life legitimate relationship was between Leighton Meester and Sebastian Stan, who dated for a couple of years while the show was still on.

Source: The CW, Getty
Read More Sebastian StanLeighton Meester
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