Girls' Generation's YoonA was generously praised by her 'The K2' co-star Ji Chang Wook during the drama's press conference which was held on September 20 at Seoul's Imperial Palace Hotel.

Ji Chang Wook said, "First, our chemistry is great. The chemistry is great with Song Yoon Ah and also with Im YoonA, and we talked at great length on set. I think we became close getting to know one another just talking and discussing the drama. YoonA's personality is bright. I think she is an actress who gives laughter to all the staff members on set. After talking to her, I realized that she is someone who is very obsessed with and ambitious about acting and thinks a lot about it. I got the thought that she is an acting partner that I can trust."