Kim Sung Kyu is a South Korean singer-songwriter, musician, actor, MC, and member of the South Korean boy band "Infinite" debuted on June 9, 2010. Kim was in a school rock band called "Coma Beat". In 2007, he auditioned for SM Entertainment but failed to make the cut, and auditioned once more in 2008 only to fail again.
On February 15, 2013 he graduated from Daekyeung University’s Practical Music program and received the ‘Proud Daekyung University Student award’.
He was also the first member out of Infinite to release a solo album, titled Another Me.
His debut as a musical actor was in January 2012, in the musical "Gwanghwamun Sonata". His first role was in the 2018 theatrical play "Amadeus". He enlisted on May 14, 2018 and was discharged on January 8, 2020. He continued to do various musicals, even during his military service.
He left Woollim Entertainment in March 2021.
On June 14, 2021, he signed with Double H TNE, a subsidiary of NHN & MLD Entertainment.
On April 22, 2022, he released his fourth EP "Savior"
(Source: Wikipedia, Soompi)