Hyeri's stellar acting on 'Reply 1988' was all thanks to Ryu Joon Yeol? You best believe it! 

On the April 14 airing of 'Happy Togehter,' Hyeri revealed that she received a lot of help from fellow actor Ryu Joon Yeol on how to squeeze out those tears for a convincing tear-jerking scene. 

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Hyeri said, "In the drama, I was worried about whether the viewers would also feel how sad I felt, so called Ryu Joon Yeol in the hopes that he would give me some tips and tricks. I wasn't that close to him then but I gathered up my courage to call him anyway. When I asked him if he could come to the office, he willingly came over. He's the one who taught me best."