Ha Ji Won officially became a dirty-mouthed actress through her North Korean cursing.

In MBC 'Section TV' aired on March 11th, the press conference of 'The King 2Hearts' was shown.

During the interview, Ha Ji Won said that her cursing became more frequent after filming for the drama. She said, "I'm worried that my mouth is getting dirtier", and Lee Seung Gi said, "It's true."

The reporter asked her to say a few words in North Korean and after hesitating for a bit, Ha Ji Won showed her North Korean cursing. But her voice was made mute, making the viewer’s laugh. Ha Ji Won got up from her seat and apologized to the viewers.