Yeo Jin Goo's revealed an episode that dealt with his mature looking face.
He appeared on MBC "Section TV Entertainment Relay," and talked about his mature looks.
He said, "my voice isn't the only thing that is mature, my face is also more mature looking than my peers. One day, a staff member didn't know my age and asked if I wanted to smoke with him."
Yeo Jin Goo chose Kim Soo Hyun as an older actor that is more similar to him. He said, "it's not that our face looks similar, I think our deep voice and personality is similar."