'The Glory' features teen and adult versions of the main characters. These 6 side-by-side images show the uncanny resemblances.

Song Hye-kyo and Jung Ji-so play the adult and teenage versions of protagonist Moon Dong-eun, who seeks revenge on her high school bullies, respectively.

Lim Ji-yeon and Shin Ye-eun play adult and teenage Park Yeon-jin, the series' foremost antagonist.

Park Sung-hoon and Song Byung-geun play adult and teenage Jeon Jae-jun, a wealthy golf club owner.

Kim Hieora and Bang Gang-hee play the adult and teenage versions of artist Lee Sa-ra.

Cha Joo-young and Song Ji-woo play adult and teenage Choi Hye-jeong, a flight attendant.

Kim Gun-woo and Seo Woo-hyeok play the older and younger versions of Son Myeong-o, Jae-jun's lackey.

Yeom Hye-ran plays housekeeper Kang Hyeon-nam, who helps Dong-eun in exchange for the killing of her own husband. She does not appear during the group's high school years.

Jung Sun-il plays construction mogul Ha Do-yeong, Yeon-jin's husband and Dong-eun's eventual opponent in the game Go. He does not appear during the group's high school years.

Lee Do-hyun plays Joo Yeo-jeong, a plastic surgeon who takes an interest in Dong-eun and teaches her how to play the game Go. He does not appear during the group's high school years.

Oh Ji-yul plays Ha Ye-sol, Yeon-jin's elementary school age daughter. She was not yet born when the group was in high school.