At the press conference for the new film 'Cooperation' on December 15, YoonA talked about Park Min Young, her movie character who secretly has a crush on Hyun Bin. 

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She said, "It was my first time acting out having a crush so it was different. Hyun Bin sunbaenim is so cool that I naturally fell for him. I think some real feelings other than acting were mixed in." She also said, "I came to understand the minds of the fans who love me."

Sounds like Hyun Bin has captured YoonA's heart during movie filming! 

'Cooperation' starring Hyun Bin, Yoo Hae Jin, Kim Joo Hyuk, YoonA, Lee Dong Hwi, and more will be hitting the theaters in January.