SEE ALSO: Song Joong Ki captures the spotlight with his cameo appearance on the latest episode of 'Queen of Tears'

McInnis had nothing but good things to say about Song Joong Ki, praising the actor, "Song Joong Ki is very intelligent and humorous. He was similar to [his character] Yoo Shi Jin in many ways. I've never ever seen him grumpy on set. No matter what the situation, and despite the many instances of things going differently than what was originally planned or changes, he maintained a positive attitude. He never got angry or once expressed his discontent. He always said, 'We can do it,' 'It's okay,' and, 'Everything will work out,'" recalling how Song Joong Ki had behaved on set.

McInnis added, "Song Joong Ki has a knack for leadership. When I first saw him, I thought he looked too effeminate and pretty. I thought he was prettier than women and that his skin was so nice. But he made the atmosphere on set, and had more than enough energy to lead everyone. He never tired or got angry and tried to get along with all the staff members and actors. He was amazing." 

I guess now we can add David McInnis' name to the Song Joong Ki fandom!