Lee Tae-il (Hangul: 이태일, born September 24, 1990),^[1] better known by the mononym Taeil (Hangul: 태일), is a South Korean singer, signed under Seven Seasons. He is the main vocalist of Block B and is part of the T2u sub-unit with U-Kwon.

Lee Tae-il was born in Seoul, South Korea, where he lived with his parents, elder sister and younger brother.^[1] He graduated from Global Cyber University and previously attended Kim Myung-ki's Vocal Academy.^[2] Prior to joining Block B, he was a contestant on MBC's Star Audition 1.^[3]

In addition to his work with Block B, Taeil performed two solo concerts in Tokyo, Japan, on January 13, 2017.^[4] He also did a seven-show, six-city tour of Japan from August 26 to September 7, 2017, along with fellow Block B member U-Kwon as the special unit T2u.^[5]

In March 2018, Taeil was named as a judge for the Blind Musician singing competition, which is sponsored by the Korea Music Copyright Association, the Federation of Korean Music Performers, and the Korean Entertainment Producers' Association.^[6]

Taeil's first solo concert in Korea was announced November 2018 and scheduled to take place on December 22 and 23 in Seoul's Olympic Park K-Art Hall. All tickets sold out almost immediately after going on sale November 28.^[7][8]

In April 2019, it was announced that Taeil and Park Kyung would hold two concerts in Seoul together on May 25 and 26.^[9][10]

On June 10, Taeil announced that he would be entering into South Korea's compulsory military duty immediately.^[11] After fulfilling his term of service, Taeil returned home on leave December 4, 2020, with his discharge becoming official the following month.^[12]