|Also known as||12 Nights|
|Written by||Hwang Sook-mi|
|Directed by||Jung Hyun-soo|
|Country of origin||South Korea|
|No. of episodes||12|
|Production company(s)||Channel A|
|Original network||Channel A|
|Picture format||1080i (HDTV)|
|Audio format||Dolby Digital|
|Original release||October 12– December 28, 2018|
Twelve Nights (Hangul: 열두밤; RR: Yeoldubam) is a 2018 South Korean television series starring Han Seung-yeon and Shin Hyun-soo. It is produced by and aired on Channel A's Fridays at 23:00 KST time slot from October 12 to December 28, 2018.
It tells the story of two people who spend twelve nights together over three different trips in 2010, 2015 and 2018.
- Jang Hyun-sung as Lee Baek-man
- Yoo Joon-hong as Ban Koo-wal
- Hwang Jae-won as Yoon Chan
- Kim Do-wan as Yoo Chan
- Ye Soo-jung as Lee Ri
- Lee Ye-eun as Kang Chae-won
- Kim Bum-jin as Yoo Ki-tae
- Lee Joo-young as Sophia
- Han Ji-eun as Park Sun-joo
- Lee Sun-tae as Lee Kyu-jin
- Bret Lindquist as Thomas
- Seo Eun-woo as Moon Hye-ran
- Cha Soo-yeon as Yoon Hong-joo
- Sung Chang-hoon as Kim Jae-wook
- Lee Gun-woo as Kang Eun-pyo
- Kim Yi-kyung as Joo A-reum
- Hwang So-hee as Park Se-jung
- Felipe Arca as Pierre
- Kim Young-joon as Kang Seok
- Han Da-sol as Cheon Da-young
First script reading took place early June, 2018 at Donga Digital Media Center in Sangam-dong, Seoul, South Korea.
- [무료] 열두밤 미리보기 '비포 더 나잇' 다시보기 Full VOD 공개 TWELVE NIGHTS 한승연 신현수 금요일 밤 11시 채널A. YouTube (in Korean). Channel A. Retrieved December 30, 2018.
- "Han Seung Yeon (Kara) takes lead role in a romantic drama". JTBC. October 4, 2018.
- ""Age Of Youth" Co-Stars Han Seung Yeon And Shin Hyun Soo To Reunite As Leads Of New Drama". Soompi. May 8, 2018.