Jung Chan Woo, who plays Lee Min Ho's child counterpart on 'Heirs', is also revealed to have played his child counterpart on 'Boys Over Flowers' as well! On the 7th episode of 'Heirs', a scene of their past showed how Kim Tan (Lee Min Ho) and Choi Young Do (Kim Woo Bin) went from being best friends to enemies. Viewers noticed that the child actor who plays Lee Min Ho's child counterpart looks familiar because he apparently played his counterpart four years ago in 'Boys Over Flowers'. An 'Heirs' rep confirmed, "The child actor who plays Kim Tan's child counterpart is indeed Jung Chan Woo. He also acted as the younger Goo Jun Pyo, played by Lee Min Ho, in 'Boys Over Flowers'." Did you notice when you watched episode 7?