The year he turned 23, he debuted with a small part in the film A Frozen Flower. In 2010, he says, he began working in theater with the play Cats on the Roof. In 2012, he played Kyung-min in the same play.
In 2014, he played the boxer Min-wook in the play Judo Boy. In 2015, he appeared in the play The Pride and played Gil-yu in the SBS drama Six Flying Dragons, which he says was his first villain role. In 2016, he appeared as Secretary Cha in the SBS drama Don’t Dare to Dream.
In 2017, he appeared in the KBS2 drama Black Knight: The Man Who Guards Me. In 2018, the film Gonjiam: Haunted Asylum was released, and at the end of the year he won best new actor at the KBS Drama Awards for My Only One and Black Knight: The Man Who Guards Me. In 2019, he played Tak Soo-ho in the KBS2 drama Justice. In 2020, he appeared in the KBS2 drama Memorials.
The breakthrough yearThe year he turned 37, The Glory Part 1 was released and he became known as Jeon Jae-joon. Hankyoreh writes that his name recognition had not been high until then, and Newsis writes that this series ended his long period of obscurity.
In 2023, The Glory Part 2 was released. In 2024, he played Yoon Eun-seong in the tvN drama Queen of Tears and appeared on You Quiz on the Block in May. In September he held his first fan meeting in Japan, in Tokyo, and on Dec. 26 Squid Game season 2 was released. In 2025, he appeared again as Hyun-ju in Squid Game season 3.
In 2026, he appeared in the JTBC drama Efficient Dating for Singles, and in July he performed in the play Lungs and held a fan meeting in Yokohama.
Park Sung-hoon (born Feb 18, 1985) debuted in 2008, the year he turned 23, in the film A Frozen Flower, and became known when The Glory Part 1 was released on Dec 30, 2022, the year he turned 37, with his role as Jeon Jae-joon. Squid Game season 2 was released on Dec 26, 2024, the year he turned 39.
Ages are by calendar year (the year minus the birth year), birthdays aside.
Debuted with a small part.
Source 01 · Topstar News (Korean) · Park Sung-hoon update (May 2026) · opens in a new tabSource 02 · Etoday (Korean) · Who is Park Sung-hoon · opens in a new tab The year is confirmed in news reports; the release date is not. Etoday says he debuted in theater first, while Topstar News describes the small part in A Frozen Flower as his debut.He says he began working in theater in 2010 with this play.
Source 03 · IZE (Korean) · Park Sung-hoon interview · opens in a new tab The start date comes from a 2014 interview. The performance date is not confirmed.Played Kyung-min in the fifth cast, alongside Jang Ji-woo.
Source 04 · TV Report (Korean) · Cats on the Roof, fifth cast · opens in a new tab The Jan. 7 article date is when the fifth cast was announced.My Daily writes that “Three Days communications team leader” had even appeared in portal search autocomplete.
Source 26 · My Daily (Korean) · Three Days interview · opens in a new tabSource 23 · Sports Donga (Korean) · Rookie interview: Park Sung-hoon · opens in a new tab The broadcast date is not confirmed. A May 2014 interview confirms the year and the role.Played the boxer Min-wook at Art One Theater Hall 3 in Dongsung-dong, Seoul.
Source 05 · My Daily (Korean) · Judo Boy interview · opens in a new tab The run ended on June 29; the opening date is not confirmed.Played Oliver on a Daehak-ro stage.
Source 06 · News Culture (Korean) · The Pride interview · opens in a new tab Based on an Aug. 7 interview article; the performance date is not confirmed.Appeared as Gil-yu, the son of Gil Tae-mi, played by Park Hyuk-kwon. By his own account it was his first villain role.
Source 07 · Busan Ilbo (Korean) · Six Flying Dragons, Gil-yu · opens in a new tab Based on an article about the Oct. 19 episode 5. The premiere date is not confirmed.Appeared as Secretary Cha, who serves Ko Kyung-pyo’s character.
Source 08 · OSEN (Korean) · Don’t Dare to Dream, Secretary Cha · opens in a new tabSource 02 · Etoday (Korean) · Who is Park Sung-hoon · opens in a new tab The start date is not confirmed. A November 2016 interview, just after the finale, confirms the year of the appearance. Its Korean title translates as Jealousy Incarnate.In the Wednesday-Thursday drama, played Park Gon, who is engaged to Kim Young-mi, played by Shin So-yul.
Source 27 · Sports Chosun (Korean) · Black Knight stills · opens in a new tab The start date is not confirmed. An article ahead of the Dec. 13 episode 3 confirms the appearance.A horror film in which he played Seong-hun. It passed one million admissions in five days.
Source 09 · Nocut News (Korean) · Gonjiam passes one million · opens in a new tabSource 01 · Topstar News (Korean) · Park Sung-hoon update (May 2026) · opens in a new tabPlayed the dentist Jang Go-rae in the weekend drama My Only One.
Source 33 · Korea Economic Daily (Korean) · My Only One premiere · opens in a new tabSource 28 · Sports Chosun (Korean) · My Only One, Jang Go-rae · opens in a new tabSource 10 · Newsis (Korean) · 2018 KBS Drama Awards · opens in a new tab The premiere date is based on an article from the day of broadcast. The role is confirmed by an article on the Oct. 28 episode 28.Won the best new actor award for My Only One and Black Knight: The Man Who Guards Me.
Source 10 · Newsis (Korean) · 2018 KBS Drama Awards · opens in a new tabEpisodes 1 and 2 aired, with him in the role of Tak Soo-ho.
Source 29 · TV Daily (Korean) · Justice premiere · opens in a new tabSource 11 · Sports Kyunghyang (Korean) · Justice villain · opens in a new tabIn the Wednesday-Thursday drama Psychopath Diary, played Seo In-woo, a psychopath who owns the diary.
Source 32 · Maeil Business Newspaper (Korean) · Psychopath Diary premiere · opens in a new tabSource 30 · Korea Economic Daily (Korean) · Psychopath Diary, Seo In-woo · opens in a new tabA Wednesday-Thursday drama in which he appeared with Nana.
Source 31 · Maeil Business Newspaper (Korean) · Memorials main poster · opens in a new tab Based on the premiere date given in a June 15 article. The drama’s Korean title is Chulsapyo.The eight-episode Part 1 was released. Hankyoreh writes that his name recognition had not been high until then, and Newsis writes that this series ended his long period of obscurity.
Appeared again as Jeon Jae-joon in Part 2.
Source 34 · Hankook Ilbo (Korean) · The Glory Part 2 ending · opens in a new tabAppeared as Yoon Eun-seong.
Source 16 · Newsen (Korean) · Queen of Tears episode 1 · opens in a new tabAppeared on episode 242 and talked about his acting career and family history.
Source 17 · Joynews24 (Korean) · You Quiz on the Block episode 242 · opens in a new tab An OSEN article gives the broadcast as the 5th, while Joynews24 and News1 say the 1st.Held it at Mozart Hall, Katsushika Symphony Hills, in Tokyo; his agency said every seat sold out.
Source 18 · Biz Enter (Korean) · First Japan fan meeting · opens in a new tabAppeared as the transgender character Hyun-ju.
Source 24 · Hankyoreh (Korean) · Squid Game season 2 release · opens in a new tabContinued in the role of Hyun-ju.
Source 19 · Herald Business (Korean) · Squid Game season 3 · opens in a new tabA weekend drama in which he appeared with Han Ji-min.
Source 20 · The Ssen News (Korean) · Efficient Dating for Singles · opens in a new tabSource 25 · Sports Kyunghyang (Korean) · Efficient Dating for Singles · opens in a new tabAt the Chungmu Arts Center Medium Theater Black, shared the role of the man with Im Ju-hwan and Kim Kyung-nam.
Source 21 · Hankook Ilbo (Korean) · Lungs · opens in a new tab The run lasted through Aug. 2; the dates of Park Sung-hoon’s performances are not confirmed.Held it at KT Zepp Yokohama in Yokohama, about two years after he last met fans in Japan.
Source 22 · Herald Muse (Korean) · Yokohama fan meeting · opens in a new tabEND OF SELECTED RECORDSSelected records, 2008–2026 · not a complete list of work. “Key moment” is an editorial label, not a measure of success.
What did they do, and at what age?
AgeTrail lines up the key moments of a life by age.
Debut and breakthrough are marked separately, and every record has a source.
Film & TV · South Korea
Feb 18, 1985 —
Ages are counted from the birth year 1985: the year of the event minus 1985, birthdays aside. “Key moment” labels and the connecting story are AgeTrail's editorial reading.
Fact-checked: 2026.10.03 · An independent archive, not affiliated with the person or their agency.