Get ready for an epic cinematic collaboration! Two of South Korea’s most beloved and respected actors, Park Hae Il and Park Seo Joon, are confirmed to star together in director Lee Joon Ik’s highly anticipated new film, ‘Firefly.’ The news, announced by the production company on August 21, also revealed that talented actor Choi Dae Hoon will be joining the stellar cast.
A Gripping Story Unfolds with a Master Director
‘Firefly’ promises a gripping narrative, following a detective desperately seeking to escape the crushing weight of guilt by association. His journey leads him to Hwayong-myeon, driven by testimony from an unidentified man, where he eventually unearths a truth that has been meticulously hidden for 24 years. At the helm is the visionary director Lee Joon Ik, a master of historical and period dramas. Fans know his brilliance from acclaimed films like ‘The King and the Clown,’ ‘Dongju: The Portrait of a Poet,’ ‘Anarchist from Colony,’ and ‘The Book of Fish.’ Lee Joon Ik is renowned for exploring deeply human characters who bravely confront harsh circumstances, and ‘Firefly’ looks set to continue this powerful tradition. This period piece will intricately weave between two pivotal eras in Korean history: 1974, amidst South Korea’s authoritarian regime, and 1950, in the turbulent aftermath of the Korean War.
Meet the Stellar Cast: Park Hae Il, Park Seo Joon, and Choi Dae Hoon
Park Hae Il takes on the role of Man Seob, a mysterious figure who approaches the detective in 1974. He dangles the irresistible bait of a major career breakthrough if the detective ventures to Hwayong-myeon. Park Seo Joon is cast as Joon Kyung, the very detective whose career has been unfairly stifled by the guilt-by-association system. Driven by a burning desire to improve his record, Joon Kyung follows Man Seob’s lead, unaware that each step brings him closer to a long-buried secret. Adding another layer of intrigue, Choi Dae Hoon will portray Tae Sik, a deputy director of the Korean Central Intelligence Agency. Tae Sik is depicted as a man utterly convinced that his every action is a patriotic duty, a fascinating departure from some of Choi Dae Hoon’s previous roles. Filming for ‘Firefly’ is scheduled to kick off on September 27, so mark your calendars!

With the addition of these industry titans, ‘Firefly’ is already sparking immense buzz.
Park Hae Il: A Legacy of Cinematic Excellence
Park Hae Il is widely celebrated as one of South Korea’s most acclaimed film actors, revered for his ability to embody complex characters across diverse genres. His career soared with memorable performances in classics like ‘Memories of Murder’ and ‘The Host,’ the latter becoming one of the biggest Korean films of its time. He continued to impress in films such as ‘War of the Arrows,’ ‘Eungyo,’ ‘The Fortress,’ and ‘The King’s Letters.’ His most internationally recognized recent work was in 2022, starring opposite Tang Wei in Park Chan Wook’s ‘Decision to Leave.’ As detective Jang Hae Joon, he contributed to the mystery romance’s success at the Cannes Film Festival, where Director Park Chan Wook won Best Director. That same year, he powerfully portrayed Admiral Yi Sun Shin in the historical blockbuster ‘Hansan: Rising Dragon.’ Park Hae Il remains incredibly active, with ‘The Assassin(s),’ co-starring Yoo Hae Jin and Lee Min Ho, among his exciting upcoming projects.
Park Seo Joon: From K-Drama Icon to Global Star
Meanwhile, Park Seo Joon has cemented his status as a global Hallyu star. His rise to international prominence came through a string of hit K-dramas including ‘Kill Me, Heal Me,’ ‘She Was Pretty,’ ‘Hwarang,’ ‘Fight for My Way,’ ‘What’s Wrong with Secretary Kim?,’ and ‘Itaewon Class.’ His iconic portrayal of Park Sae Roy in ‘Itaewon Class’ particularly captivated audiences worldwide, significantly expanding his global fanbase following its massive success on Netflix. Beyond dramas, he has built an impressive filmography, starring in ‘Midnight Runners,’ ‘The Divine Fury,’ and ‘Concrete Utopia.’ In a significant career milestone, 2023 saw his highly anticipated Hollywood debut in Marvel Studios’ ‘The Marvels,’ where he played Prince Yan of Aladna. He continued to enthrall fans with his return as Yoon Tae Sang in Netflix’s ‘Gyeongseong Creature’ Season 2 in 2024. His most recent drama credit is JTBC’s ‘Surely Tomorrow,’ which aired in 2025.
‘Firefly’ Takes Flight: A Must-Watch Collaboration
The exciting combination of Park Hae Il’s critically acclaimed filmography and Park Seo Joon’s massive international fan following, all under the masterful direction of Lee Joon Ik, ensures that ‘Firefly’ is destined to be one of the most talked-about Korean films in production right now. This star-studded period piece is undoubtedly one to watch!



