Kang Tae-hyun (; born February 5, 2002), known mononymously as Taehyun, is a South Korean singer and songwriter. He is a member of the South Korean boy band Tomorrow X Together, formed by Big Hit Entertainment in 2019.
Taehyun was born on February 5, 2002 in Seoul, South Korea. He attended Hanlim Multi Art School.
Taehyun was the fourth member of Tomorrow X Together to be revealed, having undergone three years of training with Big Hit Entertainment. The group debuted on March 4, 2019, with the extended play (EP) '. The EP peaked at number one on the Gaon Album Chart and Billboard World Albums Chart.
From January to May 2021, Taehyun co-hosted EBS radio show "Listen" with fellow member HueningKai. In February 2022, Taehyun featured on the single "PS5" by American singer-songwriter Salem Ilese, alongside bandmate Yeonjun and Norwegian DJ Alan Walker.
In December 2023, Taehyun began hosting his first solo web variety show titled Academy Reincarnation. The show, produced by SK Broadband, features Taehyun visiting various academies to learn new skills.
In May 2024, Taehyun collaborated with Japanese singer and actor Tomohisa Yamashita for the song "Perfect Storm", which was featured in the Fuji TV drama "Blue Moment". On November 18, Taehyun and HueningKai released the single "Can't Stop" for the soundtrack of ENA series Brewing Love. On February 14, 2025, the pair also released the song "Surfing in the Moonlight" for the Netflix series Melo Movie. On July 10, Taehyun was featured alongside Kim Chaewon on Jvke's single "Butterflies".
In 2020, Taehyun made his songwriting and composing debut on Tomorrow X Together's song "Maze in the Mirror" from their . In 2021, he stated songwriting is "a fun challenge" and noted the importance of good top-lining. In an interview with Elle, Taehyun stated writing lyrics helps give authenticity and persuasiveness to the music he performs. Taehyun has noted Justin Bieber and The Kid Laroi as inspirations for his songwriting, saying he looks at "pop artists and pop stars who are pushing the genre forward".
On his birthday in 2024, Taehyun donated million () to the Fruit of Love Community Chest of Korea to support culturally underprivileged youth. He repeated the donation in 2025.
In December 2024, Taehyun became a Guinness World Record holder for being part of the world's longest line of people consecutively catching a kendama ball. The event took place during the 75th KÃ Âhaku Uta Gassen in Tokyo, Japan, where he was the first catcher in a lineup of 128 participants.
All song credits are adapted from the Korea Music Copyright Association's database.