The popular SBS entertainment program 'Running Man' members, especially Yoo Jae Suk, speculated the relationship between actress Lee Sung Kyun and actor and Running Man member Lee Kwang Soo. On the most recent episode of SBS entertainment program 'Running Man' actress Lee Sung Kyung joined the Running Man members as a guest. The Running Man members were happy to see her. While they were greeting her, Yoo Jae Suk said all of a sudden, "Hey guys, isn't she the Lee Kwang Soo's lady Wang Ji Hye was talking about?" and made the members speculate their relationship. The popular SBS entertainment program 'Running Man' airs every Sunday night, and stars members Yoo Jae Suk, Gary, Haha, Ji Suk Jin, Kim Jong Kook, Lee Kwang Soo and Song Ji Hyo.