Actor Lee Jong Suk revealed his playful side.

On Feb. 13, Lee Jong Suk posted on his Instagram, "It's a secret but... my stomach keeps coming out...? Hahahaha," as the caption to his picture.

In the picture, Lee Jong Suk is making a cute face expresion and posing for the camera. He is wearing destroyed jeans while holding up V-signs with his fingers like a little boy.

Lee Jong Suk has been receiving much love with his most recent drama "Pinocchio".