Song Hye-kyo's Name Appears on Song Joong-ki's Movie Ending Credit?

Did you know that Song Hye-kyo's name comes out in the ending credit of Song Joong-ki's latest movie 'The Battleship Island'? 

On July 19th, actors and actresses starred in 'The Battleship Island'―including Song Joong-ki―attended the movie premiere.
When the movie was over, Song Joong-ki's fiance Song Hye-kyo's name came out in the ending credit section.  

The film's director Ryu Seung-wan said, "Song Hye-kyo sent a coffee cart to the set. We put people's name if they send us food." 

After director Ryu's interview, people began to burst into laughter.

(Credit = SBS funE, SBS)   

(SBS Star)