IU's agency Loen Entertainment revealed that her 'Dream High' co-star, Kim Soo Hyun, attended one of her concerts recently, proving that the two have remained good friends!

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The rep told Newsen on June 3, "On May 29, Kim Soo Hyun attended IU's little theater concert 'Just One Step.. That Much More' and watched from the audience.  After both IU and Kim Soo Hyun appeared in drama 'Dream High' together, they have consistently been in contact with each other.  IU maintains her relationships with her friends from 'Dream High' and they all get along well."

Meanwhile, this is becoming a hot topic on the internet as people claim to have witnessed the two together.  Despite his busy schedule as a famous Hallyu star, Kim Soo Hyun managed to find the time to watch his good friend's concert!