The Gossip Girl actress admitted to Digital Spy that she grew up with a fondness for rockstar Corgan.
"I was reading a journal, I was probably like 10 or 11, and I'd written in it, 'I love Billy Corgan and I always will.' That's a little weird, right?" she said.
Asked if she still felt the same way about Corgan, Meester replied: "Not like that! Not that undying love that I thought I had."
Meester's new movie The Roommate, which opens in UK cinemas on Friday, centres on a college student (Minka Kelly) who discovers that her roommate (Meester) has a violent fixation on her.
Watch our video interview with Leighton Meester below: