The First Man

Ham Eun-jung

Oh Jang-mi / Ma Seo-rin· 80 ep

Oh Hyun-kyung

Chae Hwa-young· 80 ep

Yoon Sun-woo

Kang Baek Ho· 80 ep

Park Geon-il

Kang Jun Ho· 80 ep

Kim Min-seol

Jin Hong Ju· 80 ep

Jeong So-yeong

Jung Suk Hui [Jang Mi and Seo Rin's biological mother]· 80 ep

Kim Hak-seon

O Bok Gil [Jang Mi's adoptive father]· 80 ep

Lee Hyo-jeong

Ma Dae Chang [Seo Rin's grandfather]· 80 ep

Lee Ki-chang

O Tae Pyeong [Jang Mi's brother]· 80 ep

Lee Jae-hwang

Lee Gang Hyeok [Hwa Yeong's confidant]· 80 ep

Jung Chan

Kang Nam Bong [Baek Ho and Jun Ho's father]· 80 ep

Kim Sun-hye

Yeom San Wol [Hong Ju's mother]· 80 ep

Choi Ji-yeon

Han Yeong Ja [Baek Ho and Jun Ho's mother]· 80 ep

Kim Young-pil

Ma Dong Seok [Jang Mi and Seo Rin's biological father]· 80 ep

Ahn Joo-in

Yang Geom-sun [Maid ]· 80 ep

Han Si A

Tae Suk [Young]· 4 ep

Lee Myung Hee

[Landlady]· 2 ep

Lee Da-yeon

[Luxury store employee]· 1 ep

Lee Seop

[Actor]· 1 ep

Jeong Yeo-reum

Oh Tae-sook· 1 ep

Yoon Jae-jin

[OB-GYN doctor]· 1 ep

Kang Myung-soo

[Gardener]· 1 ep

Kim Ra Hui

[Tae Suk's daughter]· 1 ep