SBS revealed behind-the-scenes pictures and still cuts of Krystal on the set of the upcoming drama 'My Lovely Girl'.

They reveal that the f(x) member will be showing a different image than her usual cute, feisty persona on stage. She softened her look for a more ordinary appearance with dark hair, bangs, and casual attire.  

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Director Park Hyung Ki said, "Maybe it's because of her ambitious personality, but she has more enthusiasm for the production than anybody else. Despite taking on a difficult character, she shows her determination to pull it off through her gaze to the point you can see sincerity in Krystal when she's in front of the camera. I think that's the reason it's impossible not to get immersed in her at first sight."

The drama premieres on September 17.