Lynn Q. Yu wrote the script for
Unnie in 2023, and it was voted onto
The Black List of best unproduced screenplays in 2023. The project was picked up by production company Badlands, along with
Thunder Road Films, and
Hong Won-ki was hired to direct in July 2024. The film was later retitled
Perfect Girl, and
Arden Cho joined the producing team. followed by
Jeon Somi and
John Harlan Kim much later in the year.
Principal photography began in late October 2025 in
Thailand, with
May Hong, Peter Lee Jae Yoon, Samantha Cochran,
AC Bonifacio,
Achiraya Nitibhon,
Nancy, Siyoon, and
Chaerin rounding out the cast.
Principal photography began in
Thailand. In November 2025, Bonifacio suffered a
motorcycle taxi accident on a day off, breaking her
humerus. The production had finished several weeks of filming, but ultimately decided her role would have to be recast and reshoots would be needed. ==References==