The brunette beauty admitted just that to Us Weekly at the show's 100th episode celebration, saying, "I used to have a crush on one of my castmates - and it's not who you think."
Our first guess would be Ian Harding (Ezra) considering the duo has had a pretty steamy on again, off again romance. It's the obvious choice.
So, if it isn't Ian, who is the mystery man Lucy had her eyes on?
The country crooner wouldn't say. But, there are far more crush-worthy hotties on the show that could've caught her attention, like Keegan Allen (Toby) or Ryan Guzman (Jake).
Whoever the mystery man is inspired Lucy to right a song about him, telling the mag, "My song Lie A Little Better" is about that experience.
"I would be a liar if I said I was fine. But I cant help being honest and I know now is not the time. The truth is I'm fallin' to pieces anytime that you're around. Trouble is the truth keeps slippin' out," she sings in the lyrics.
What is your guess? Who do you think Lucy had a crush on? Tell us in the comments!