張赫
In 2011, he played the younger part of the title character in the historical drama "Warrior Baek Dong-soo". He also made a brief appearance as teenage Ddol-bok in the drama "Deep Rooted Tree". The appearance was upon the request of its lead actor Jang Hyuk, who took a liking to Yeo when the latter portrayed his younger version in the drama "Tazza".