Wi Hyun-yi (Korean: 위현이; August 5, 1991), known professionally as Wi Ha-joon (위하준), is a South Korean actor. He is best known for his role as Hwang Jun-ho in Netflix's Squid Game (2021–2025). Wi has also starred in the films Gonjiam: Haunted Asylum (2018), Shark: The Beginning (2021) and Midnight (2021), as well as the television series Something in the Rain (2018), Romance Is a Bonus Book (2019), 18 Again (2020), Bad and Crazy (2021), Little Women (2022), The Worst of Evil (2023), and The Midnight Romance in Hagwon (2024). In 2022, Wi was named one of GQ Korea's Men of the Year. Wi is managed by MSTeam Entertainment.
Wi was born, as Wi Hyun-yi, on August 5, 1991,on the island of Soando in Wanju County, South Jeolla Province, and grew up on his family's abalone farm. During high school, he joined a dance club in his spare time. Other than that, he was also the student body president.
He had a math and English instructor. Because of that, despite living in a small town, his English grammar skills were always ahead of his peers. Ironically, his worst subject was language.
While his teachers expected him to get into a good university through rural admission, he rejected that idea, and left a letter to his parents before going to Seoul to do theatre and film. During the first semester, he felt it was a waste and dropped out in order to continue his military services. After being discharged, he continued in his studies.
Wi made his acting debut in 2012, starring in the short film Peace in Them. Wi made small appearances in several films, before he was cast in a main role in the 2018 film Gonjiam: Haunted Asylum. The same year, he appeared in a supporting role in the television series Something in the Rain.
In 2019, Wi appeared in the television series Romance Is a Bonus Book alongside Lee Jong-suk, Lee Na-young and Jung Yoo-jin. The series received positive reviews and Wi was praised for his acting, earning a nomination for Best New Actor - Television at the 55th Baeksang Arts Awards. In 2020, Wi appeared as a famous baseball athlete in the television series 18 Again, based on the American film 17 Again.
Wi received international recognition in 2021 for his role in the hit Netflix series Squid Game, portraying the character Hwang Jun-ho, a police officer who sneaks into the game to find his missing brother. The cast was praised by critics for their acting and the show itself won numerous awards, including six Primetime Emmy Awards and the Grand Prize at the 58th Baeksang Arts Awards. Wi reprised his role as Hwang Jun-ho in both the second season (2024) and third season (2025).
In 2021, Wi also played a serial killer in the thriller film Midnight, and starred alongside Lee Dong-wook in the television series Bad and Crazy. Wi returned in 2022 with the Netflix series Little Women. The series achieved double-digit ratings for its final episode in South Korea.
In 2023, Wi starred in the Disney+ series The Worst of Evil alongside Ji Chang-wook and Im Se-mi, and the Netflix series Gyeongseong Creature alongside Park Seo-joon, Han So-hee, Soo Hyun, Kim Hae-sook and Jo Han-chul.
In 2026, Wi starred in TvN's romantic thriller Siren's Kiss. It is based on the 1999 Japanese television series Ice World by Hisashi Nozawa, which follows an insurance investigator tracking a series of fraud cases leading to a woman related to several deaths.
Public relations ambassador from Soan-myeon (2022)