Actress Park Si Yeon and Nam Gyu Ri showed off their beauty.

On Monday Nam Gyu Ri posted on her Twitter, "With Si Yeon," along with a photo.

In the photo Nam Gyu Ri is acting as if she is biting the head of Park Si Yeon who is smiling brightly. In another photo, the two are showing off incomparably equal beauty.

Internet users who saw the photo commented, "You guys must have been close already?", "Park Si Yeon is so pretty," and "Nam Gyu Ri didn't age at all.”

Photo: Nam Gyu Ri Twitter