2010–2011: Debut with Infinite and solo activities Kim made his debut as the leader and main vocalist of South Korean boyband
Infinite in 2010. The group officially debuted on June 9, 2010. In the same years, he was featured in
Epik High's music video "Run" along with fellow members
Woohyun, Sungyeol,
L, and Sungjong. Kim along with
Infinite members
Sungyeol and
Seongjong became the special DJs for Super Junior's Kiss the Radio while
Super Junior's
Leeteuk and
Eunhyuk were away. They were in charge of the radio broadcast from October 24 to the 30th in 2011. Kim and other members of Infinite dubbed the children's cartoon
Wara Store from December 27, 2011 to March 27, 2012 as themselves.
2012–2014: Solo debut and solo activities , July 2013 Kim made his debut as a musical actor, along with band member
Woohyun, in the musical "Gwanghwamun Sonata". Kim plays the role of Jiyong, the son of the female lead. The musical lasted from January 3 until March 11, 2012. In May 2012, it was announced that Kim would join
Immortal Songs 2 as a fixed member alongside
Super Junior's
Ryeowook. His first performance on the show was aired on June 23. In July, it was announced that he would be leaving the show due to Infinite's overseas promotions. His final episode on the show aired on August 25. Kim released his solo EP,
Another Me on November 19.
Nell's Kim Jongwan gave his composed "Shine" to Kim as a gift for his pre-release, which was released on November 7. Kim also composed the lead single "60 Seconds" with
Sweetune and personally participated in writing the lyrics for the track "41 Days".
L starred as the main character on the music video. Kim made a short promotion period of three weeks, and the album became the top selling physical album for the month of November with 62,958 copies sold. The album peaked at No. 22 with an album sales record of 70,552 copies on
Gaon Chart's yearly physical album chart for 2012. In 2013, the album managed to be in the Monthly Top 100 Gaon album sales and at the end of the year recording 13,283 copies. Within the year 2014, the album's additional sales were 6,098 copies. Since its release until March 2015, the total albums sold was 91,212 copies. In January 2013, Kim was confirmed to be a fixed cast on
JTBC Lee Soo-geun and
Kim Byung-man's
High Society 2 along with
Super Junior's
Shindong. The show was aired from February 9 to June 15. In February 2013, Kim was confirmed to have made a cameo appearance in KBS's new sitcom
A Bit of Love alongside four other idols,
MBLAQ's
G.O,
KARA's Seungyeon,
ZE:A's
Siwan, and
Secret's Ji Eun. According to representatives, they'll appear as the younger versions of the five main characters for about three weeks. Kim played the younger version of Lee Hoon. In April 2013, Kim joined
tvN's new reality program,
The Genius: Rules of the Game. In addition, Kim was also featured in
KBS2's new variety show "The Sea I Wanted", which told the story of six men's travel and experience in the open sea. The show is initially planned for a three-episode pilot with the first episode airing on September 11. In October 2013, he made the first featuring since debut in rapper Kanto's debut single
What You Want. In 2014, Kim was cast in the musical
VAMPIRE along with
Super Junior's
Sungmin and
F.T. Island's
Lee Hong-gi.
2015–2017: Solo comeback and television roles On January 29, 2015, Kim was confirmed to star in new
KBS variety show,
Fluttering India, along with
Exo's
Suho,
CNBLUE's
Jonghyun,
Super Junior's
Kyuhyun,
TVXQ's
Changmin, and
SHINee's
Minho. He was promoted double lead singles "The Answer" and "Kontrol" for which the music video were released on May 11. As of June 2015, the album has sold over 75 thousand copies locally. On May 15, 2015, Kim and L with other artists such as
Exo,
Girl's Day,
Sistar,
Niel and
Ailee sang the theme song for
KBS1 Special Program 'I Am Korea', titled "The Day We Met", for Gwangbok's 70th Anniversary". He was also cast in the musical
In The Heights, along with bandmate Dongwoo (cast as the male lead 'Usnavi'). Kim played the main role 'Benny' with
Exo's
Chen and actor Seo Kyung-soo. The musical was produced by
SM C&C, a subsidiary of
SM Entertainment, and ran from September 4 to November 22 at 'Blue Square'. On September 17, 2015, it was revealed that Kim would star in a new
KBS series,
Youth Express, alongside comedian
Kim Sook and actor Park Jaemin. In June 2016, he hosted JTBC's variety show
Girl Spirit with comedian Jo Se-ho. The program aired on July 19. In February 2017, he was confirmed as an MC for Channel A's variety show
Singderella. It was later reported that he'd sustained a rib injury while filming the programme which ultimately led to the delay of Infinite's comeback. August 2017 marked the release of "Drama" by R&B producer Primary featuring Kim, which topped multiple domestic charts.
2018–2020: First full album solo comeback, concert, theatre play performance, and military enlistment On January 25, 2018, it was announced that Kim will be participating in his first play, Amadeus, taking on the role of Mozart. On February 26, 2018, Kim returned as a solo artist with his first full album,
10 Stories. The album was well received and its lead single, "True Love", garnered wins on two music shows and topped domestic chart. The album was also ranked ninth on Billboard's world album charts for the week ending March 10. On March 29, 2018, Kim announced his first solo concert "Shine", which took place from May 5–7, 2018 in Seoul. The tickets for all three concert days were sold out within 3 minutes. More seats were added to all three days one day before the concert. On the last day of his solo concert, Kim made the surprise announcement that he is enlisting into the military on May 14, 2018. He served as an active duty soldier for the 22nd Division Infantry "Yulgok" located in the Goseong area (North Eastern part of South Korea). On July 3, 2018, it was announced that Kim would be starring in a military musical 'Shinheung Military Academy'. On September 8, 2019, it was announced that Kim will be in the military musical 'Return: The Promise of the Day'. On December 14, 2020, Kim made his solo comeback with his third EP,
Inside Me, and its lead single "I'm Cold".
2021: Departure from Woollim On March 1, Kim chose not to renew his contract and left Woollim Entertainment on March 6. However, he remains a member of Infinite. After his departure, he released his first single album ''
Won't Forget You'' and its lead single "Hush" on March 29 as his last work under Woollim. On June 14, 2021, Kim signed with DoubleH TNE, a subsidiary of NHN & MLD Entertainment, after the expiration of his contract with his former agency.
2022: LV concert and solo album On February 28, 2022, Kim announced his fourth solo concert "2022 Kim Sung Kyu Concert 'LV' (Light & Voice)", which took place from April 22–24, 2022 at
Jamsil Indoor Stadium in Seoul. On April 18, 2022, Kim announced a domestic tour including the previously mentioned Seoul concert and further concerts taking place in Busan (June 4–5, 2022) and Daegu (June 11–12, 2022). On April 22, 2022, Kim released his fourth EP,
Savior, and its lead single of the same name. In December 2022, Kim was announced as a mentor judge for JTBC's survival show
Peak Time.
2023: Solo and Infinite activities From February 10–12, 2023, Kim held his fifth solo concert "2023 Kim Sung Kyu Concert 'LV'(Like Your Vibes)", which took place at Yes24 Live Hall. and Taipei (June 11, 2023). In January 2023, Kim was announced as a cast of the musical
Red Book, playing the character Brown. On May 8, 2023, it was announced that Infinite has established a new agency, Infinite Company, and Kim is the representative of the company. Infinite is accelerating preparations for full-scale activities by opening new Infinite official social media accounts on Twitter, Instagram, Facebook, and a YouTube channel. On June 1, 2023, Kim announced that his 5th mini-album
2023 S/S Collection would be released on June 28, 2023.
2024: Musicals and LV3 solo concerts Kim released a remake song "Feeling" on music sites on January 1, 2024. On January 3, 2024, it was announced that Kim would play the lead role of Evan Hansen in Asia's premiere of the
Dear Evan Hansen musical, a winner of 6 Tony awards, including Best Picture and Best Original Screenplay, at the 71st Tony Awards in 2017. Kim held his LV3: Let's Vacay in Seoul concert from August 3–4, 2024, at Jamsil Student's Gymnasium, which were sold out on both days. He continued his LV3: Let's Vacay concerts in Kuala Lumpur on 10th to 11th August, in Taipei on 17th August, in Bangkok on 24th August and concluded the tour in Hong Kong on 31st August to 1st September 2024. Kim returned to his role as Charlie in the musical
Kinky Boots 10th anniversary performances. On September 2, 2024, Kim appeared in the first episode of
Tour Fairy, a travel series with Kim as a tour guide, which is released through the YouTube channel Mdromeda Studio. == Discography ==