When the Stars Gossip

Did You Know?

• Filming began in April 2022 and ended by February 8, 2023.
• Lee Min-ho announced the end of filming on his Instagram account.
• Oh Jung-se was offered a role which was under review on January 26, 2022.

Cast and characters

Lee Min-ho portrays Gong Ryong, an obstetrician-gynecologist with a strong sense of responsibility who arrives at the space station as a tourist. Gong Hyo-jin plays Eve Kim, a Korean-American astronaut. Oh Jung-se appears as Kang Kang-su, a space experiment expert who has been on the space station for ten months. Han Ji-eun plays Choi Go-eun, the CEO of MZ Electronics, daughter of Choi Jae-ryong, and Gong Ryong's fiancée.

People at MCC include Kim Joo-hun as Park Dong-ah, a veteran astronaut who has been to the space station three times and is also a member of Seoul's MCC with Eve Kim; Lee El as Kang Tae-hee, a world-famous astronaut and the first Korean-American woman to become IOU Space Center Vice President; Lee Cho-hee as Dona Lee, Mina Lee's twin sister and a space doctor of IOU who checks the overall medical condition of the astronauts of Expedition 3; Lee Hyun-kyun as Han Si-won, a director of flight operations; and Park Ye-young as Ma Eun-soo, MCC's mouse experimental partner.

People at ILS include Lee Cho-hee as Mina Lee, a space scientist in charge of plants and Dona Lee's twin sister; Heo Nam-jun as Lee Seung-joon, a space scientist in charge of mice; and Alex Hafner as Santiago Gonzalez Garcia, an astronaut from IOU Space Center.

People at MZ Group include Kim Eung-soo as Choi Jae-ryong, the chairman of MZ Group; Baek Eun-hye as Na Min-jung, a pediatrics and adolescents doctor at MZ Hospital; Kim Kyung-duk as Secretary Go, Go-eun's secretary; and Im Sung-jae as Jeon Yi-man, Professor of Obstetrics and Gynecology at MZ Hospital.

People around Gong Ryong include Jeon Soo-kyeong as Ji Hwa-ja, Ryong's mother; Choi Jung-won as Jang Mi-hwa; Jung Young-joo as Jung Na-mi; Jo Jung-suk as a newscaster; and Park Jin-joo as a reporter.