Actor�Song Joong Ki revealed a heartwarming story about his father.

Song Joong Ki was a guest on�SBS Power FM's 'Park So Hyun's Love Game', where he shared, "I saw my father stop students walking by and telling them, 'Have you seen the movie 'Wolf Boy'? I'm Joong Ki's father, and this time the extended version is out so be sure to watch it again.'"

On how he feels about his father's actions, he commented, "It was a bit embarrassing, yet I felt really good."

The actor continued, "After 'Nice Guy' ended, I called my father, and he said to me, 'I want to go see your last filming, so I am heading to Tongyeong right now.' I was deeply moved as he said this. I began to think that I should be better to him."

"On a certain program, Kim Kuk Jin once compared popularity to a roller coaster. After that, my popularity kept on rising, but I have always been keeping in mind that my popularity can fall at any time. I want to continue to better my acting skills and become an acknowledged actor. I want to expand my knowledge through working on a variety of different projects."

Song Joong Ki was asked if he would consider the quality of the work moreso than the actors that he would be working with, and he replied, "The quality of the work is more important. That is why I chose 'A Tree with Deep Roots'. There was an actress I wanted to work with in a different production, but because of the quality of the work, I chose 'A Tree with Deep Roots'."

When asked who the actress was, he answered, "I can't say, but she was in a production that came out during a similar time as mine," making many wonder about the identity of the mystery actress.