Itaewon Class (Drama - 2020)

• Park Seo-joon (박서준) Park Sae-roy - Owner of Danbam, Soo-ah's friend from high school (박새로이 - 단밤 사장, 수아의 고등학교 동창)

• Kim Da-mi (김다미) Jo I-seo - Danbam manager, sociopath, Ep. prologue, Ep.3~ (조이서 - 단밤 매니저, 소시오패스 , 1회 프롤로그, 3회 ~)

• Yoo Jae-myung (유재명) Jang Dae-hee - Jangga Group chairman, Geun-won and Geun-soo's father (장대희 - 장가그룹 회장, 근원과 근수의 아버지.)

• Kwon Nara (권나라) Oh Soo-ah - Jangga Group Director of Strategic Planning Team, Sae-ro-i's first love from high school (오수아 - 장가그룹 전략기획팀장, 새로이의 첫사랑, 새로이의 고등학교 동창.)

• Kim Dong-hee (김동희) Jang Geun-soo - Geun-won's stepbrother, Dae-hee's son of a concubine (장근수 - 근원의 이복동생, 대희의 아들이자 서자.)

• Ahn Bo-hyun (안보현) Jang Geun-won - Jangga Group's eldest son, Geun-soo's stepbrother, school bully, hit and run driver (장근원 - 장가그룹의 장남, 근수의 이복형. 학교폭력 가해자. 뺑소니 교통사고 가해자.)

• Kim Hye-eun (김혜은) Kang Min-jeong (강민정)

• Ryu Kyung-soo (류경수) Choi Seung-kwon - Dan Bam staff, former gangster (최승권 - 단밤홀 직원, 전직 조폭 [3회 이후 합류])

• Lee Joo-young (이주영) Ma Hyeon-yi - Danbam cook (마현이 - 단밤 주방장. [3회 ~])

• Chris Lyon (크리스 라이언) Kim Tony (김토니)

• Son Hyun-joo (손현주) Park Seong-yeol - Park Sae-roy's father - Special appearance (박성열 - 새로이의 아버지 [1회 특별 출연])

• Lee David (이다윗) Lee Ho-jin - Student at Gwangjin High where Sae-ro-i goes to, school bully victim (이호진 - 새로이가 전학간 광진고 학생, 학교폭력 피해자.)

• Yoon Kyung-ho (윤경호) Oh Byeong-heon - Detective who witnesses Seong-yeol's hit-and-run accident (오병헌 - 성열의 뺑소니 교통사고 사건을 묵인한 형사)

• Kim Yeo-jin (김여진) Jo Jeong-min - I-seo's mother (조정민 - 이서의 어머니)

• Kim Mi-kyung-I (김미경) Kim Soon-rye (김순례)

• Won Hyun-joon (원현준) Kim Hee-hoon - Sae-ro-i's prisonmate (김희훈 - 새로이의 교도소 동기)

• Choi Yoo-ri (최유리) Oh Hye-won - Byeong-heon's daughter (오혜원 - 병헌의 딸)

• Yoo Da-mi (유다미) Kim Seon-ae - Jangga group chairman Jang Dae-hee's assistant (김선애 - 장가그룹 회장 장대희의 비서)

• Hong Seo-jun (홍서준) Kim Head of a department (김실장)

• Kim Ik-tae (김익태) Hwang Sang-ho (황상호 - 광진고등학교 교장)

• Han Ye-ji (한예지) Daughter of the mayor (구청장 딸 국복희)

• Solbin (솔빈)

• Baek Seung-hyun (백승현) Sae-ro's homeroom teacher (새로이 담임)

• Kim So-yeong (김소영) Radio DJ (라디오 DJ)

• Yoon Park (윤박) Kim Seong-hyeon - Geun-soo's friend (김성현 - 근수의 아는 형)

• Moon Yoo-kang (문유강) Hunting man (헌팅남)

• Cha Chung-hwa (차청화) Mayor's wife (구청장 부인)

• Hong Seok-cheon (홍석천) Hong Seok-cheon (홍석천)

• NC.A (앤씨아) I-seo's high grade alumnus - Bok-hee's clique - Ep.3, 5 Special Appearance (이서의 고등학교 동창 - 복희의 패거리 - 3회, 5회 특별출연)

• Ri Min (리민) Man who came to a part-time job interview at night - Special appearance (단밤 알바 면접보러 온 남자 - 특별출연)

• Jung Yoo-min (정유민) Pharmaceutical company chairman's daughter - Geun-soo's blind date (제약회사 딸 - 근수의 맞선녀)

• Seo Eun-soo (서은수) College girl who came to for a night part-time job interview - Special appearance (단밤 알바 면접보러 온 여대생 - 특별출연)

• Choi Myung-bin (최명빈) Young Jo I-seo (조이서 아역)

• Lee Joon-hyuk-I (이준혁) Father-in-law head of department, department head Park (장가 박부장)

• Kim Il-joong (김일중) Best Carriage MC (최강 포차 MC)

• Jeon No-min (전노민) Do Joong-myeong - Joongmyeong Holdings CEO (도중명 - 중명 홀딩스 대표이사)

• Park Bo-gum (박보검) Male part-timer for Soo-ah's store interview (수아의 가게에 면접 보러온 남자 알바)

• Ok Ye-rin (옥예린) Young Oh Soo-ah (오수아 아역)

• Im Jung-min (임정민)

• Baek Seung-chul (백승철)

• Cha Seung-ho (차승호)

• Kim Dae-heung (김대흥) Police academy panel judge (경찰대학 심사위원)

• Kwak Hee-joo (곽희주)

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