The King: Eternal Monarch actress Kim Go Eun has had a ball filming the SBS drama. Over the past few weeks, she has been sharing photos and behind-the-scenes photos from the series to reveal that she made numerous fun memories while shooting. A new video shared by the star just adds to the collection. In the new video she shared on Instagram, Go Eun is seen goofing around in between takes. The actress sported an all-black ensemble in the shot.