Big Mouth (Korean: 빅마우스; RRBingmauseu) is an upcoming South Korean television series starring Lee Jong-sukIm Yoon-ah and Kim Joo-hun. It is scheduled to premiere on MBC TV on July 29, 2022, and will air every Friday and Saturday at 21:50 (KST).


DIRECTOR- Oh Chung-hwan, Bae Hyun-jin

WRITTEN BY- Kim Ha-ram

GENRE- Crime, Legal, Hardboiled


COUNTRY- South Korea

RELEASE DATE- July 29, 2022


credit: kdrama zone trailer


Park Chang-Ho (Lee Jong-Suk) works as a lawyer with a measly 10% winning rate. He is a talkative person and, because of this people call him Big Mouth. He happens to get involved in a murder case and he is somehow fingered as genius swindler Big Mouse.

Due to this, Park Chang-Ho finds himself in a life-threatening situation. Meanwhile, Go Mi-Ho (Lim Yoon-A) is Park Chang-Ho’s wife and she works as a nurse. She has a beautiful appearance and a personality that is both wise and brave.


She helped her husband become a lawyer by supporting him financially and psychologically. Go Mi-Ho learns that Park Chang-Ho is suspected to be the genius swindler Big Mouse and attempts to clear her husband’s name.


  • A third-rate lawyer with a ten percent success rate and is called as “Big Mouth” by his legal acquaintances due to his tendency to speak before acting. His life is suddenly in danger when he is mistaken for a genius conman known as “Big Mouse”.
  • Im Yoon-ah as Go Mi-ho:
  • Chang-ho’s supportive wife who is a nurse and has bold personality, as well as outstanding beauty.
  • Kim Joo-hun as Choi Do-ha:
  • The ambitious mayor of Gucheon, whose goal in life is to become the most dignified president.


Supporting Cast

NR Forum

  • Yang Kyung-won as Gong Ji-hoon: the president of the media conglomerate Gukdong Daily and the chairman of the NR Forum.
  • Kim Jeong-hyun as Jung Chae-bong: the director of Chilbong Academy.
  • Lee Yoo-joon as Han Jae-ho: a surgeon.
  • Oh Ryung as Lee Du-geun: legal counsel of NR Forum.
  • Yoon Seok-hyun as Cha Seung-tae: managing director of OC Group.
  • Park Hoon as Seo Jae-yong: head of the Department of Internal Medicine, Hematology and Oncology at Gucheon University Hospital
  • Kim Kyu-seon as Ashley Kim: Ji-hoon’s wife, who is a Korean-American and the director of Woojung Gallery.
  • Jang Hyuk-jin as Choi Jung-rak: a prosecutor at Gucheon Public Prosecutors’ Office.


Gucheon Hospital

  • Ok Ja-yeon as Hyun Joo-hee: Do-ha’s wife who is the director of Gucheon Hospital.
  • Kim Seon-hwa as Park Mi-young: the head nurse at Gucheon Hospital.
  • Park Se-hyeon as Jang Hee-joo: a nurse at Gucheon Hospital.

Gucheon Prison

  • Jeong Jae-sung as Park Yoon-gap: the director of Gucheon Prison.
  • Kim Dong-won as Gan Su-cheol: a prison officer at Gucheon Prison.
  • Kwak Dong-yeon as Jerry: a scammer with three previous convictions who respects the genius conman “Big Mouse”.
  • Yang Hyung-wook as Noh Park: a prisoner at Gucheon Prison.


People around Chang-ho

  • Lee Ki-young as Go Gi-kwang: Mi-ho’s father.
  • Oh Eui-shik as Kim Soon-tae: a lawyer who is Chang-ho’s best friend and assistant.

Extended Cast

  • Yoo Tae-ju as Tak Kwang-yeon: a prisoner at Gucheon Prison.
  • source:(a)


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