Main •
Park Min-young as Yoon Yi-rang : The leader of Team Confidence Man, a genius conman in the top 1% of South Korea with an IQ of 165 • Ki So-yu as young Yoon Yi-rang •
Park Hee-soon as James : The spiritual pillar of Team Confidence Man, a middle-aged man who exemplifies French chic. •
Joo Jong-hyuk as Myung Gu-ho : He is the youngest member of Team Confidence Man, with a pure and upright personality and a tall and handsome appearance
Supporting •
Hyun Bong-sik as Mr. Mule, porter in episode 1 • Kim Young-mi
Cameo •
Song Ji-hyo as Baek-hwa, a shaman (Episode 1) •
Lee Bong-ryun as Yesol's mother (Episode 1) •
Jung Woong-in as Jeon Tae-soo, loan shark kingpin (Episode 1, 2) • Jung Yi-joo as Kim Bo-ra, an art student with dreams (Episodes 3, 4) •
Lee Yi-kyung as Yoo Myung-min, art critic, a buyer for the world's top auction house. • Choi Hong-il as Kim Yong-bok, a master of forgery •
Rowoon as a manager, (Episodes 3, 4) •
Kim Joo-ah as Han Jae-hee, victim of a botched surgery •
Kim Sun-young as Jae-kyung Hospital's CEO Lee Sun-mi •
Ha Jun as surgeon, Jo Sung-woo • Kwon Da-ham as Im Kwang-sik • Kim Han-jong as Mr. Mustache •
Yoon Chae-kyung as Lee Hye-yoon, beauty YouTuber and victim of Gil Mi-in •
Oh Na-ra as Gil Mi-in, the CEO of Mystique •
Yura as gas station worker •
Yoo Seung-mok as Lee Sung-min •
Park Myung-hoon as Ha Jung-ho, CEO of HaHaJungho, a large-scale seafood distribution company • Kim Byeong-chun as Oh Chang-dae, factory owner •
Kim Bo-sung as himself •
Kim Tae-hoon as Kang Yo-seop, a famous architect and professor, CEO of Josef Architects •
Kang Nam-gil as Mr. Jo Man-bok •
Um Hyo-sup as Yoo Sang-won, Minister of Land, Infrastructure and Transport • Jung Ae-yeon as Lee Na-ra,lawyer and acting representative of Jay Fund International •
Han Groo as Ko Sang-hee, girlfriend of James •
Yeo Hoe-hyun as Oracle Engineering and the second-generation tycoon ==Production==