On November 20, SBS' 'One Night of TV Entertainment' visited the set of popular drama 'Heirs' and interviewed Kim Mi Kyung, who plays Eun Sang's mother, and Kim Sung Ryung, who plays the role of Kim Tan's mother. Kim Mi Kyung revealed her first impressions of fellow co-star Kim Woo Bin, who plays the bad boy Cho Young Do, on the show. She said, "When I first saw him, I thought he looked really rebellious. However, in real life, he is very shy and kind," and both actresses agreed that he was extremely well-mannered. She also mentioned how he always ate by himself at convenience stores in the drama, saying, "He always eats cup ramen. It made me want to make a meal for him." The actress also revealed that the cast of the show gets along, saying, "If there are a lot of peers gathered, there could be trouble, but everyone really has fun filming." You can hear her talk about him at 2:28 in the above video. The two onscreen moms also revealed that Park Shin Hye actually calls Kim Mi Kyung "mom" offstage and says, "My mom's here," while Lee Min Ho would massage Kim Sung Ryung's shoulders.