Get to Know the Cast and Characters of the Korean Drama 'BIG MOUTH', Including the Handsome Lee Jong Suk!

Lee Jong Suk plays Park Chang Ho, a lawyer with a court win rate of only 10% due to being considered an incompetent lawyer, heavily in debt, and not many people using his services.  

Im Yoo Na plays Ko Mi Ho, who works as a nurse. Ko Mi Ho is Park Chang Ho's wife and has a lively, intelligent, proactive, and quick-witted character. In addition, she is also a dedicated person to her work, making her a determined and fearless risk-taker.  

Kim Joo Hun plays Mayor Gucheon, who is full of intrigue and has an evil strategy named Choi Do Ha. Although he appears to have a calm demeanor, he harbors strong and manipulative grudges in his heart. In addition, he is also the first person to involve Park Chang Ho in trouble.  

Ok Jae Yeon plays the role of Hyun Ju Hee, the Director of Gucheon Hospital. She is Choi Do Ha's wife who is always ready to defend her husband in front of anyone who belittles him. She has a cold, intelligent, and unpredictable nature.   

Kwak Dong Yeon plays the role of Jerry, a prisoner who is close to and supports Park Chang Ho while in the prison cell. He helps Chang Ho a lot in saving his life and is reliable.  

Yang Kyung Won plays the role of a businessman who works in the media industry and also as a leader of a forum consisting of businessmen named Gong Ji Hoon. As a successful businessman, he looks down on Choi Do Ha and does not want the mayor to be more successful than him.  

Jung Jae Sung plays Park Yeon Gab, he is a figure who is not hesitant to torture, extort, and even kill prisoners. He is also the third person in the organization led by Big Mouse.