Shin Si-ah (; born May 12, 1998) is a South Korean actress. She made her debut as the lead in Park Hoon-jung's film The Witch: Part 2. The Other One. Since then, she appeared in the drama Resident Playbook as Pyo Nam-kyung, an obstetrics and gynecology resident.
Early life and education Shin was born on May 12, 1998, as an only child. In her first year of high school, she watched the musical Carmen. The experience sparked her interest in acting. To build her confidence, she spent the next two years watching four musicals a week. In her senior year, she mapped out her goals: to study theater and film, perform in plays, join a production company, and eventually produce independent films. She took her first major step toward these goals by enrolling in the Department of Theater and Film at Hanyang University.
Career From 2018 to 2019, Shin was listed as a cast member of the TV Mini Series My Darling Boyfriend. In 2019, Shin was cast in the short film Prasad. The film centers on a girl who survives a bus accident alone and is subsequently bullied on social media, leading to her transformation into a real witch. The film was screened at the 18th Mise-en-scène Short Film Festival.
In 2020, Shin was cast as the lead in The Witch: Part 2. The Other One following an audition process with odds of 1,408 to 1. The first and second rounds consisted of non-face-to-face video auditions. After advancing to the third round, she met director Park Hoon-jung for an in-person audition. She then had approximately five or six subsequent meetings with the director before ultimately being selected. The entire audition period lasted about three months. At that time, it was reported that Shin was affiliated with the agency Andmarq as a rookie actress.
On March 13, 2022, Shin signed an exclusive contract with Andmarq. On June 15, the movie The Witch: Part 2. The Other One where Shin is the lead, premiered. On July 17, Shin had her first solo pictorial shoot since her debut with W Korea.
On January 20, 2025, Andmarq confirmed Shin's casting in the movie The Old Woman with the Knife, where she plays a younger version of the main character, Hornclaw. The film was subsequently invited to the Berlinale Special section of the 75th Berlin International Film Festival. On February 14, Shin joined Chef Edward Lee, Byun Yo-han and Go Ah-sung in a variety show called Edward Lee's Country Cook.
Shin made her drama debut on tvN's Resident Playbook as Pyo Nam-kyung, a first year resident doctor, alongside Go Youn-jung, Kang you-seok, and Han Ye-ji. It premiered on April 12, 2025. On June 9, Shin signed an exclusive contract with Management Soop. She starred in the romance film Even If This Love Disappears From the World Tonight directed by Kim Hye-young, based on the novel of the same name. It was released theatrically on Christmas Eve 2025, and is also available to stream on Netflix since February 2026.
Endorsements In 2020, Shin appeared in a cosmetics brand advertisement as a ballet teacher. On June 23, 2022, Shin was selected as the main model for Plus X's modern Asian skincare brand Diponde. In 2023, Shin, was selected as model for Coca-Cola's hydration drink Toretta!.
In 2024, Mongdol, a brand that pursues natural minimalism, released a pictorial for its 2024 summer collection campaign with Shin. The pictorial was part of the "Mongdol X Sia" campaign.
Filmography
Film + Year Title Role Notes 2019 Prasad Do-hwa Short film 2022 The Witch: Part 2. The Other One Girl (Ark 1 Datum point) Feature film debut 2025 The Old Woman with the Knife Young Hornclaw Even If This Love Disappears From the World Tonight Han Seo-yoon Netflix film
Television series + Year Title Role 2025 Resident Playbook Pyo Nam-kyung So-ran
Web series + Year Title Role 2018 My Love Dog Boyfriend Go-eun 2019 When Two Male Friends Fight Over Me Si-ah
Television shows + Year Title Role 2025 Edward Lee's Country Cook Cast member
Music Video Appearances + Year Title Artist 2026 "Blue Coral Reef" Lee Su-hyun
Discography Soundtrack appearances + List of soundtrack appearances, showing year released and selected chart positions Title Year Peak chart positions Notes KORFor peak positions on the Circle Digital Chart: "A Race": "A Race" () 2025 96 Resident Playbook OST
Accolades Awards and nominations + Name of the award ceremony, year presented, category, nominee of the award, and the result of the nomination Award ceremony Year Category Nominee / Work Result Asia Model Awards 2022 Best New Actress The Witch: Part 2. The Other One Baeksang Arts Awards 2026 Best New Actress – Film Even If This Love Disappears From the World Tonight Best New Actress – Television Resident Playbook BIFF Marie Claire Asia Star Awards 2022 Rising Star Award The Witch: Part 2. The Other One Blue Dragon Film Awards 2022 Best New Actress Chunsa Film Art Awards 2022 Best New Actress Grand Bell Awards 2022
Listicles + Name of publisher, year listed, name of listicle, and placement Publisher Year Listicle Placement Cine 21 2020 New Actress to watch out for in 2021 1st
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