Park Hae-soo is a South Korean actor. He is popular for his portrayal of Kim Je-hyuk and Cho Sang-woo in the South Korean television series Prison Playbook (20172018) and Squid Game (2021), respectively.In 2007, he appeared in the theater play Annapurna (2007), and he acted in his first musical Puberty as Yeongmin in 2008.Between 2009 and 2011, he appeared in the play Hero in which he played the role of Choi Jae-hyung..Other theater plays in which Hae-soo has appeared are 39 steps (2009), A Streetcar Named Desire (2010), Seagull (2011), Macbeth (2014), Frankenstein (2014), Judo Boy (2015), and Male Impulse (2017).He has also appeared in the musicals Three Thousand Flower of Destruction (2012), God is watching (2013), The Chorus Oedipus (2013), and Asteroid B612 (2015).In 2013, Park Hae-soo was seen in the South Korean drama Me and Mom and Dad and Grandma and Anna in the role of Appa (father). Park Hae-soo in a scene from Me and Mom and Dad and Grandma and Anna (2013).Between 2015 and 2016, he appeared in the SBS drama Six Flying Dragons in which he was seen playing the historical figure Yi Ji-ran, the founder of Chonghae Yi Clan of the Joseon Dynasty. Six Flying Dragons is the story of the founding of the Joseon Dynasty and the historical figures in the Joseon Era, with a focus on Yi Bang-won, the third Joseon king, Taejong of Joseon. Park Hae-soo in a scene from Six Flying Dragons (2015-16).He was then seen as Hong Dong-pyo in the superhit SBS Kdrama Legend of the Blue Sea (2016), which tells the story of love and rebirth of the mermaid Shim Cheong (played by South Korean actress Jun Ji-hyun) and human Heo Joon-jae (played by South Korean actor Lee Min-ho) in connection to the parallel past of their Joseon-era incarnations. Park Hae-soo in a scene from Legend of the Blue Sea (2016).In 2017, he met a South Korean woman through an acquaintance, and they began dating. He married the same woman (a non-celebrity), six years younger his age, in a private ceremony after a year of dating. Lee Ki-seop, an old friend of Hae-soo and a musical artist, was their wedding moderator. Park Hae-soo with his wife at their wedding.He then acted in the tvN Kdrama Prison Playbook (2017-18) in which he played his first lead role as Kim Je-hyuk. The drama focuses on the lives of the behind-bar convicts, families of those convicts, and the duty officers working in correctional facilities. In the drama, Kim Je-hyuk is a superstar baseball player who is put behind bars for assault after saving his sister from a sexual assault. Prison Playbook (2017-18).