Song Joong Ki and Song Hye Kyo's relationship off - screen has been intriguing for fans, and that have caused rumors to be in the air. Recently Song Joong Ki was spotted with actor - comedian Lee Kwang Soo, which sparked rumors of yet another off - screen relationship.

Notably, photos of Lee and Song were taken in front of a convenience store in Seoul. The couple was reportedly filming for the upcoming television adaptation of "The Sound of Your Heart."

Reportedly, Song would have a cameo appearance in the sitcom, similar to Lee's appearance in "Descendants of The Sun" drama series. "The Sound of Your Heart" will star Lee and Jung So Min as the leading actors.

Song and Lee have been open about their friendship in public, and during a fan meet in Wuhan, China, Song told his fans that he would have been Lee's manager, had he not been an actor. However, he also loves acting like his life.

"I hit 30 while I was in the military. Looking back, my 20s were spent acting, so when I entered my 30s, I became really hungry for it," Song said, as quoted by Soompi.

"I can't tell you how much I wanted to act then. I still feel that way now," he added. "I'm not tired, and I don't even want to take a break. I've rested from acting enough when I was in the military."

As is seen by Song's evident love for acting, he has been working hard to please his fans and on tour throughout Asia to visit and interact with his fans across the globe.

Song is scheduled to appear at the 2016 Baeksang Awards this June 3 at the Hall of Peace Kyung Hee University, as the nominated Best Actor for his performance in the famous drama series "Descendants of The Sun."