The Beauty Inside (TV series)

The Beauty Inside is a 2018 South Korean television series based on the 2015 film of the same name; starring Seo Hyun-jin, Lee Min-ki, Lee Da-hee, and Ahn Jae-hyun. It aired on JTBC from October 1 to November 20, 2018.

Synopsis
About the love story of Han Se-gye (Seo Hyun-jin) who is an A-list actress. She is known as a troublemaker and the object of many rumors. Her life is a mystery, but, in reality, she suffers from an unusual phenomenon. At a certain point every month, her appearance changes to a different person. Seo Do-jae (Lee Min-ki) who is an executive director of an airline company, seems perfect. He is attractive and intelligent but he actually suffers from prosopagnosia. The two eventually fall in love.

Main

 * Seo Hyun-jin as Han Se-gye
 * A top actress who is the subject of numerous rumors, especially because she occasionally suddenly disappears from public view. Every month she transforms into someone else for a week (e.g., old lady, young boy, Caucasian lady etc.) Only a few people know her secret and they do their best to cover for her.  She is the model for T Road Airline. She has a connection with Do-jae which she is unaware of.


 * Lee Min-ki as Seo Do-jae
 * Director of an airline company, T Road Air who has face blindness after his brain was injured in an accident. He hides his disorder from the world, and remembers people's habits and appearance to recognize them. He has a connection with Se-gye which he too is unaware of.


 * Lee Da-hee as Kang Sa-ra
 * Seo Do-jae's step-sister, who bickers with him to hide her inferiority for not being the biological daughter of Sunho Group. She owns One Air, Seo Do-jae's rival in business whom she aspires to surpass. She eventually falls in love with Ryu Eun-ho.


 * Ahn Jae-hyun as Ryu Eun-ho
 * A prospective priest known for his peaceful and calm nature. He protects Han Se-gye's secret as her close friend. Love interest of Sa-ra. He changes his dream because of Sa-ra.

People around Han Se-gye

 * Moon Ji-in as Yoo Woo-mi
 * Han Se-gye's manager and close friend who also knows her secret.


 * Kim Hee-jung as Han Sook-hee
 * Han Se-gye's mother.


 * Ryu Hwa-young as Chae Yoo-ri
 * An actress who is Han Se-gye's rival and tries her best to bring Se-gye down.

People around Seo Do-jae

 * Lee Tae-ri as Jung Joo-hwan
 * Seo Do-jae's secretary. He is sarcastic and straightforward, but is unwaveringly loyal to Seo Do-jae. He is one of the few people who know about Seo Do-jae's illness.


 * Na Young-hee as Im Jung-yeon
 * Seo Do-jae's mother and Kang Sa-ra's stepmother.


 * Lee Moon-soo as The President Im
 * Seo Do-jae's grandfather and Im Jung-yeon's father. He thinks Do-jae is incompetent and incapable, unaware of his illness.

People around Ryu Eun-ho

 * Lee Han-wi as Ryu Eun-ho's father
 * Kim Ye-ryeong as Ryu Eun-ho's mother
 * She is strongly against Eun-ho becoming a priest but eventually accepts.


 * Oh Yoo-jin as Ryu Ah-ram, Ryu Eun-ho's younger sister.

Others

 * Kang Nam-gil as Kang Dae-sik
 * A professor who is married with Im Jung-yeon. Kang Sa-ra's father.


 * Lee Jung-hyuk as Yoon-ha
 * Lee Ga-ryeong as Actress
 * Moon Sook as Woo-jin's mother
 * Kim Seung-wook as Lee Hee-sub
 * Lee Cheol-min as Director Kim
 * Kang In-seo
 * Oh Se-young as Joo Ga-young

Special appearances

 * Kang So-ra as herself (Ep. 1)
 * Ye Ji-won as herself (Ep. 1)
 * Lee Jae-yoon as himself (Ep. 1, 4)
 * Ha Si-eun as herself (Ep. 1)
 * Kim Jun-hyun as Han Se-gye (Ep. 1)
 * Son Sook as Han Se-gye (ep 1)
 * Kim Ki-doo as Doctor (Ep. 1)
 * Choi Dae-chul as Donor (Ep. 1)
 * Kim Sung-ryung as Han Se-gye (Ep. 1, 2)
 * Ko Kyu-pil as Han Se-gye (Ep. 1, 2)
 * Kim Min-seok as Han Se-gye (Ep. 5, 6)
 * Moon Woo-jin as Han Se-gye (Ep. 8, 9)
 * Ra Mi-ran as Han Se-gye (Ep. 10)
 * Heo Young-ji as Han Se-gye's fan (Ep. 13)
 * Jeon Hye-bin as Han Se-gye (Ep. 16)

Production
First script reading took place on July 22, 2018.