Shin Ha-kyun and Yeo Jin-goo's relationship

Shin Ha-kyun and Yeo Jin-goo have a special tie.

The two met in the movie "No Mercy for the Rude" six years ago.

Yeo Jin-goo was the kid act for Shin Ha-kyun in this movie in 2006.

In this picture, 8 year-old Yeo Jin-goo is different from the prince we now see in the drama "The Sun and the Moon".

Meanwhile, Yeo Jin-goo has played the childhood versions of Ju Ji-hoon in "Antique", Lee Joon-gi in "Iljimae", Lee Beom-soo in "Giant" and Kim Soo-hyun in the drama "The Sun and the Moon".