The bromance of Jo In Sung, Song Joong Ki and Lee Kwangsoo is one of the most popular celebrity friendships in Korean entertainment, dating back from years ago. But even best friends sometimes feel disappointed in each other and Jo In Sung recently shared an incident where he felt disappointed with the "Descendants of the Sun" actor.

According to a report by All Kpop, Jo In Sung made the revelation during his guesting on "Happy Together." "The King" actor said that he was recently very disappointed in his Song Joong Ki who took the win at the Daesang Award."

"When he made his speech, he didn't mention me," Jo In Sung said in jest. "I guess he wasn't thankful to me."

Despite the ribbing and the teasing that must have happened between the two actors in the aftermath of the awards, Jo In Sung said that he was very happy for Song Joong Ki's success. Jo In Sung, while he is always cast in serious leading men roles, is known to be very playful when it comes to his friends.

When Lee Kwangsoo asked him for his autograph to complete a mission for his variety show "Running Man," the actor originally pretended not to know the caller. When Lee Kwangsoo asked him to stop joking around, he said he didn't give out autographs and he only greeted his fans with handshakes. When Lee Kwangsoo called again, Jo In Sung deliberately pretended that he was talking to a delivery guy, making Lee Kwangsoo, the comedian, laugh at his antics, Kpopstarz reported.

The three actors have maintained their close friendship for many years, even taking a trip to Thailand together to celebrate Song Joong Ki's discharge from the military which was Jo In Sung's initiative. When Song Joong Ki was deployed for military service, it was Lee Kwangsoo who attended his sister's wedding in his stead, bringing the "Descendants of the Sun" actor to tears when he saw the video.