The big mouth cast delivered intense performances in one of 2022’s most suspenseful K-Drama thrillers. Led by Lee Jong Suk and Im YoonA, the series aired on MBC from July to September 2022 and quickly gained global attention. The big mouth cast brought to life a gripping story about a small-time lawyer who becomes entangled in a dangerous conspiracy after being accused of being the mysterious criminal known as “Big Mouse.”
Blending legal drama, political corruption, and prison survival, the show kept viewers on edge each week. Strong character development and unpredictable twists fueled online discussions throughout its run. In addition, the chemistry between the lead actors strengthened the emotional core of the story. This article explores the big mouth cast in detail, highlights key performances, revisits unforgettable moments, and examines fan reactions that helped the series remain a trending topic long after its finale.
Overview of big mouth cast
The big mouth cast centers on Lee Jong Suk as Park Chang Ho, a lawyer with a low success rate who earns the nickname “Big Mouth” for his bold talk. His life changes drastically when he is framed as the elusive crime boss “Big Mouse.” Arrested and sent to prison, he must navigate a brutal environment while protecting his life and uncovering the truth.

Im YoonA plays Go Mi Ho, Chang Ho’s wife and a dedicated nurse. She refuses to accept the charges against her husband and actively investigates powerful figures linked to corruption in Gucheon City. Her determination drives much of the external conflict in the story.
Supporting cast members include Kim Joo Heon as Mayor Choi Do Ha, Ok Ja Yeon as Hyun Joo Hee, Yang Kyung Won as Gong Ji Hoon, and Kwak Dong Yeon as Jerry. Each character connects to a larger web of political manipulation and greed.
The drama combines legal battles, prison politics, and corporate corruption. Through layered storytelling, the big mouth cast builds tension while exploring themes of identity and survival.
Drama Highlights
The big mouth cast delivered powerful character transformations throughout the series. Lee Jong Suk portrayed Park Chang Ho with impressive range. Early episodes show him as anxious and overwhelmed. However, as he adapts to prison life, his demeanor becomes sharper and more strategic. This shift anchors the show’s central mystery.
Im YoonA matched that intensity with emotional strength. Go Mi Ho refuses to remain passive. She confronts officials, gathers evidence, and faces threats head-on. Her resilience balances the darker prison scenes and keeps the narrative grounded.
Prison confrontations stand out as major highlights. Power struggles between inmates create constant tension. Interrogation scenes also add suspense, especially when Chang Ho faces psychological pressure. Rather than relying solely on physical action, the drama builds excitement through mind games and calculated dialogue.

Cinematic lighting and tight framing enhance the suspenseful tone. Every reveal surrounding “Big Mouse” intensifies anticipation. Because of these performances and visual choices, the big mouth cast sustains momentum across all 16 episodes.
Cast Interactions
Chemistry plays a crucial role in the success of the big mouth cast. Lee Jong Suk and Im YoonA present a convincing married couple facing extraordinary danger. Their emotional exchanges through prison glass and tense reunions highlight unwavering trust.
Inside the prison, Chang Ho forms complex relationships with fellow inmates. Some offer support, while others manipulate him for power. Kwak Dong Yeon’s portrayal of Jerry adds unexpected depth, as his loyalty shifts throughout the series.
Mayor Choi Do Ha’s interactions with Chang Ho also drive suspense. Political meetings contrast sharply with prison scenes, showing two worlds of corruption. Meanwhile, Mi Ho’s fearless confrontations with elite figures showcase her growth.

Small moments of dark humor occasionally break the tension. These interactions humanize the characters and provide brief relief from the heavy plot. Through these layered exchanges, the big mouth cast successfully portrays themes of loyalty, betrayal, and resilience.
Fan Experience and Reactions
Viewers responded enthusiastically to the big mouth cast from the premiere. Social media platforms buzzed with theories about the real identity of “Big Mouse.” Each episode triggered new speculation and debate.
Fans praised Lee Jong Suk’s dramatic comeback to television after military service. Many highlighted his transformation as one of his most compelling roles. Im YoonA also received recognition for expanding her acting range beyond romantic genres.
Online discussions often focused on the drama’s twists and pacing. Hashtags related to the show trended weekly. Fans shared scene edits, emotional reactions, and detailed breakdowns of character motivations.
International audiences appreciated the balance between thriller elements and emotional storytelling. Although some viewers debated the finale’s direction, most agreed that the performances remained strong until the end. The consistent buzz confirmed the big mouth cast’s impact on the global drama community.
Memorable Moments
Several scenes cemented the reputation of the big mouth cast. The first major twist revealing false accusations shocked audiences. Chang Ho’s gradual transformation from victim to strategic player marked a key turning point.
Mi Ho’s fearless investigations also stand out. She challenges corrupt elites despite personal danger. These scenes emphasize her strength and intelligence. Additionally, prison power shifts create suspenseful turning points that redefine alliances.
The identity mystery surrounding “Big Mouse” keeps viewers guessing until the final episodes. Each revelation raises new moral questions about justice and corruption.
After the finale, interviews and behind-the-scenes clips revealed strong camaraderie among cast members. Fans appreciated glimpses of their teamwork and mutual respect. Award nominations and positive reviews further confirmed the series’ success. Through gripping storytelling and committed performances, the big mouth cast left a lasting impression on thriller enthusiasts.
Conclusion
The big mouth cast transformed a complex conspiracy plot into an engaging emotional journey. Lee Jong Suk and Im YoonA led the series with depth and conviction, while supporting actors strengthened the suspenseful atmosphere.
By blending legal intrigue, prison drama, and personal loyalty, the show carved its place within modern K-Drama thrillers. Character growth and psychological tension kept audiences invested from start to finish.
If you want more detailed cast features and drama insights, visit the koreafiz page for the latest updates and in-depth reviews.
FAQ
Who are the main actors in the Big Mouth Cast?
The main actors include Lee Jong-suk as Park Chang-ho and Im Yoon-ah as Go Mi-ho, supported by Kim Joo-hun and Ok Ja-yeon.
Why is the Big Mouth Cast significant in K-dramas?
The cast’s strong performances and chemistry elevated the drama, making it popular worldwide and a standout in Korean entertainment.
What makes Lee Jong-suk’s role in Big Mouth special?
His portrayal of a wrongly accused lawyer blends vulnerability with resilience, creating a layered and memorable character.
Resources
- Soompi: Big Mouth Cast News
- KDramaStars: Big Mouth Cast Insights
- NME: Big Mouth Review and Highlights
- MyDramaList: Big Mouth Cast & Characters

