Leighton Meester leightonprison.jpgArchive pic

Say what? I'm surprised Gossip Girl herself hasn't found this out yet!

The Star reports that Leighton Meester, who plays the Queen B on TV's sexiest show, was "born while her mother was serving a federal prison sentence in Texas. The mom was allowed to stay in a halfway house for the birth, but had to return to prison on the day Leighton turned three months."

What was her mom's crime? Apparently, she had a role in a "major drug-running ring" - whoa, that's nuts!

And you thought Serena had a troubled past!