Joo Won revealed a straight face self-camera picture.

Today, actor Joo Won posted on his Twitter, "Go Ee Sup, Kakao. Haha" along with a picture.

In the picture, Joo Won is taking a self-camera picture at the filming site with the other actors as the background. The straight face of Joo Won is especially catches the attention. The actors in the background are also taking self-camera pictures.

Internet users who saw this commented, "Is Kakao taking a self-camera picture right now?," "JooWon, a paparazzi?," "Professional bridal mask, taking pictures secretively," and "So funny."

Photo Credit: Joo Won Twitter