Shin Si-ah (신시아) is a South Korean actress and model born on May 12, 1998. She is studying theater and film at Hanyang University, having developed an interest in the stage and musicals at a very young age.
She first appeared in a few low-budget productions, notably the short film Prasad in 2019. Her career really took off when she was chosen from among more than 1,400 candidates to play the lead role in The Witch: Part 2. The Other One. Released in 2022, the film helped her gain recognition among a wide audience. In it, she plays a mysterious young woman from an experimental program, in a particularly physically demanding role that blends action and fantasy.
In 2025, Shin Si-ah continued her film career with The Old Woman with the Knife, in which she plays the younger version of Hornclaw. The film was featured in the Berlinale Special section. That same year, she also played Han Seo-yoon in the romance Even If This Love Disappears From the World Tonight.
She made her true debut in a television series in 2025 with Resident Playbook, a spin-off series of Hospital Playlist. In the series, she plays Pyo Nam-kyung, a first-year resident in obstetrics and gynecology, alongside Go Youn-jung, Kang You-seok, and Han Ye-ji. This role allows her to showcase a more down-to-earth and emotional side following her remarkable debut in action films.
In 2027, she is scheduled to appear in Grand Galaxy Hotel, in which she plays Ko Sang-sun in one of the leading roles. She is also involved in the project Dameul Neomji Masio (Do Not Climb over the Wall), in which she is set to play another leading role.
At the same time, Shin Si-ah appeared on the show in 2025 Edward Lee's Country Cook. After starting her career with Andmarq, she signed with Management Soop in June 2025.
Although she is still early in her career, she has already made a name for herself with a wide variety of roles, ranging from fantasy and action to romance and medical dramas.
