Woozi

Biography

Lee Ji-hoon (Korean: 이지훈; born November 22, 1996), known by his stage name Woozi (우지), is a South Korean singer, songwriter and record producer. Managed by Pledis Entertainment, he is a member of the South Korean boy band Seventeen, the leader of its vocal team, and part of its subunit Hoshi X Woozi.
In 2022, he made his solo debut with "Ruby". Aside from his work as a soloist and with Seventeen, Woozi has also written for other K-pop artists such as NU'EST W, Ailee, and I.O.I.

Early life

From a young age, Woozi studied classical music and learned to play the clarinet and other band instruments. He successfully auditioned for Pledis Entertainment and met labelmate Bumzu, a frequent collaborator on music production. He graduated from Hanlim Multi Art School and subsequently enrolled in Hanyang University.
In 2022, he enrolled in a Master's degree at Anyang University.

2015–present: Seventeen solo and sub-unit activities

On May 26, 2015, Woozi debuted in the self-producing group Seventeen with the single "Adore U". He helped write and produce every track on their debut extended play (EP) 17 Carat. He has since become Seventeen's main producer along with Bumzu and is credited for writing over 80% of the group's discography as of January 2019.
Shortly thereafter, Woozi began writing for other artists as well. In 2016, he and Ailee wrote lyrics for her collaboration with Eric Nam, "Feelin'". In 2017, Woozi wrote the last single released by the project group I.O.I, "Downpour", whose lyrics received praise. Later that year, he gifted the song "Thankful for You" (지금까지 행복했어요) to labelmate Baekho of NU'EST W, which was featured in the group's first EP W, Here. Woozi became a full member of the Korea Music Copyright Association in 2019. On October 15, 2019, Woozi released the song "Miracle" for the soundtrack of the television series The Tale of Nokdu.
In 2021, he worked with fellow Seventeen member Hoshi on the latter's song "Spider", which debuted at number five on the Billboard World Digital Song Sales chart. That year, Woozi won Best Producer at the 6th Asia Artist Awards, becoming the youngest recipient of the accolade in the show's history. He released his first mixtape, Ruby, on January 3, 2022. Its lead single, the first track he wrote entirely in the English language, reached number one on iTunes charts in at least 18 different regions, including Chile, Mexico, Indonesia, and Philippines.
On January 26, 2024, Woozi officially released the song "What Kind of Future×What kind of future26 January 2024 · SingleSpotify (search)YouTube Music (search)Tracklist · 1 track1What kind of future3:51" as a birthday gift to his late friend Moonbin, who had died the previous year.
On February 19, 2025, Pledis Entertainment announced that Woozi would be debuting in a sub-unit alongside Hoshi as Hoshi X Woozi, with the release of a single album titled Beam on March 10.

Endorsements

In October 2022, Korean fashion brand Romantic Crown announced that they had selected Woozi as their brand model for their 2022 Fall/Winter collection. In March 2023, the brand collaborated with Woozi on a second collection, which featured clothing referencing "Universe Factory", Woozi's nickname for his music studio.

Military service

Woozi commenced his mandatory military service in the South Korean military on September 15, 2025, as an active duty soldier. He performed for Ground Forces Festival (also known as Army Fest), held in Gyeryong, South Chungcheong Province, on October 1–5, 2026.