There's no doubt why IU gained the moniker "nation's princess" and that is because the idol-actress could instantly mesmerize the public with her undeniable charm and aura.
Interestingly, the "Broker" star not only captivated fans with her beauty but also fellow celebrities.
Although he once mentioned the British actress and model Kaya Scodelario as her ideal woman, fans speculate that Kim Soo Hyun had a crush on IU.
It was after the duo starred in KBS2's "Dream High" where they played the role of high school friends.
It was then followed by a reunion project in the 2015 drama "The Producers" where they were joined by top stars Gong Hyo Jin and Cha Tae Hyun.
Interestingly, suspicions increase regarding Kim Soo Hyun's feelings towards IU after co-star Gong Hyo jin reportedly mentioned that he acted more manly around the idol-actress during the last scene.
Moreover, when IU called him "handsome" Kim Soo Hyun was reportedly very flustered by the co-star's praise.