Pemeran First Man

Ham Eun Jung

as O Jang Mi | Ma Seo Rin

Pemeran Utama

Yoon Sun Woo

as Kang Baek Ho

Pemeran Utama

Oh Hyun Kyung

as Chae Hwa Yeong

Pemeran Utama

Park Geon Il

as Kang Jun Ho

Pemeran Utama

Kim Min Seol

as Jin Hong Ju

Pemeran Utama

Jung So Young

as Jung Suk Hui [Jang Mi and Seo Rin's biological mother]

Pemeran Pembantu

Kim Hak Seon

as O Bok Gil [Jang Mi's adoptive father]

Pemeran Pembantu

Lee Ki Chang

as O Tae Pyeong [Jang Mi's brother]

Pemeran Pembantu

Lee Hyo Jung

as Ma Dae Chang [Seo Rin's grandfather]

Pemeran Pembantu

Lee Jae Hwang

as Lee Gang Hyeok [Hwa Yeong's confidant]

Pemeran Pembantu

Jung Chan

as Kang Nam Bong [Baek Ho and Jun Ho's father]

Pemeran Pembantu

Choi Ji Yeon

as Han Yeong Ja [Baek Ho and Jun Ho's mother]

Pemeran Pembantu

Kim Sun Hye

as Yeom San Wol [Hong Ju's mother]

Pemeran Pembantu

Kim Young Pil

as Ma Dong Seok [Jang Mi and Seo Rin's biological father]

Pemeran Pembantu

Han Si A

as Tae Suk [Young]

Bintang Tamu

Lee Seop

as [Actor]

Bintang Tamu

Lee Hye Jo

as [Luxury store employee]

Bintang Tamu

Kim Yo Han

as [Department store employee]

Bintang Tamu

Kang Myoung Soo

as [Gardener]

Bintang Tamu

Yoon Jae Jin

as [OB-GYN doctor]

Bintang Tamu

Lee Myung Hee

as [Landlady]

Bintang Tamu

Lee Ha Lim

as [Executive]

Bintang Tamu

Kim Ra Hui

as [Tae Suk's daughter]

Bintang Tamu

Seo Hyun Joo

Screenwriter