‘Running Man’ co-stars Song Ji-hyo and Kim Jong-kook are more than friends?

Song Ji-hyo (left) and Kim Jong-kook recently got together to make content for Kim's YouTube channel. Photo: SBS

In the Aug 15 episode of Korean variety show Running Man, Yoo Jae-suk couldn’t stop teasing Kim Jong-kook and Song Ji-hyo, asking if there’s more to them than just co-stars.

His query was due to actress Song's appearance on Kim’s YouTube channel in July, where she visited Kim and they talked about exercise, shared a meal and then worked out together.