Jung Hae-in is a South Korean actor. He first made an appearance in AOA Black's music video for "Moya" in 2013 and officially debuted in the series Bride of the Century (2014). Jung gained recognition for his roles in the television series While You Were Sleeping (2017) and Prison Playbook (2017–2018). He has since appeared in the television series Something in the Rain (2018), One Spring Night (2019), D.P. (2021–2023) and Snowdrop (2021–2022).

Prison Playbook is a 2017 South Korean television series directed by Shin Won-ho and starring Park Hae-soo and Jung Kyung-ho. The series marks Park Hae-soo's first-ever lead role. It aired on tvN from November 22, 2017 to January 18, 2018, every Wednesday and Thursday at 21:10 (KST) for 16 episodes.