Gong Seung-yeon Reveals Past Physical Fight With Sister TWICE’s Jeongyeon

Actress Gong Seung-yeon has shared a candid account of a volatile childhood relationship with her younger sister, TWICE member Jeongyeon, including an incident that resulted in a physical injury just before the K-pop star’s debut.

The revelations were made during an appearance on the YouTube talk show Salon Drip 2 in an episode released on April 14, 2026. During the program, Gong Seung-yeon discussed the dynamics of her sibling relationships alongside other guests, including IU, Byeon Woo-seok, and Noh Sang Hyun.

Childhood Conflict and Discipline

While discussing sibling friction, Gong Seung-yeon admitted that she frequently hit her younger siblings. She specifically noted that her immediate younger sister, Jeongyeon, is only one year younger than her.

View this post on Instagram about Gong, Jeongyeon

Gong described a recurring pattern where Jeongyeon would attempt to report their fights to their mother, at which point Gong would react by hitting her sister with a phone.

The actress also recalled a specific instance of severe discipline from her father. She stated that after hitting her younger sister in her father’s car, he forced her to exit the vehicle at a bus stop approximately three stops away from their destination.

Gong noted that this occurred during the winter and that she was forced to walk home barefoot. Despite the circumstances, she recalled that she was still expressing anger toward Jeongyeon during the walk home, noting that she was 20 years old at the time.

The Pre-Debut Injury Incident

The most significant reveal involved a physical altercation that occurred immediately before Jeongyeon’s entry into the public eye. Gong Seung-yeon explained that she accidentally caused an injury to Jeongyeon’s eye during a fight.

Gong clarified that the injury was not intentional, explaining that she had aimed for her sister’s head, but Jeongyeon turned, causing the blow to land on her eye instead. This resulted in the eye becoming swollen.

The timing of the incident was particularly critical, as the day following the fight was the scheduled date for the teaser shoot of Jeongyeon’s debut survival show. Gong reflected on the potential impact of the injury, stating that it would have been disastrous if the injury had prevented Jeongyeon from debuting.

I didn’t come to my senses even as an adult. I later reflected a lot and apologized sincerely.

Gong Seung-yeon via Salon Drip 2

Professional Context

Gong Seung-yeon is currently known for her work in the industry, including her role in Perfect Crown. Her sister, Jeongyeon, is a prominent member of the globally successful K-pop group TWICE.

The discussion on Salon Drip 2 highlighted a relatable, albeit intense, sibling dynamic that contrasted with the polished public images of the celebrities involved. The actress’s transparency about her past behavior and her subsequent apologies provided a glimpse into the personal history of two high-profile figures in the South Korean entertainment industry.