'Boyfriend' gained great attention for its star-studded cast, and also for the lead actors' big age gap. Song Hye Kyo is 38-years-old, while Park Bo Gum is 26-years-old. 

Regarding the 12 year gap, Song Hye Kyo commented, "When I was first given the role, there was a lot of talk about the age so I worried that it might be overwhelming," however, "It'll be an issue if we were the same age in the drama but it's clearly a younger man-older woman relationship so I felt less overwhelmed." Song Hye Kyo added, "I tried my best to make it not overwhelming for the viewers."

The first episode of 'Boyfriend' is airing on November 28.