2011–15: Debut and career beginnings In 2007, encouraged by his father, Kai participated in and won
SM Entertainment's Youth Best Contest and signed with the company at the age of thirteen years old. He then began training in
hip-hop dance. On December 23, 2011, SM announced Kai as the first member of the company's upcoming
boy group,
Exo. He made his first televised performance alongside fellow Exo members
Luhan,
Chen and
Tao as well as other SM artists at the year-end music program
SBS Gayo Daejeon on December 29, 2011. The group officially debuted in April 2012 and has since gained significant popularity and commercial success. In October 2012, Kai participated in the promotional group
Younique Unit alongside labelmates
Eunhyuk,
Henry,
Hyoyeon,
Taemin and Luhan. The group released a single titled "Maxstep" as part of the collaboration between SM Entertainment and
Hyundai. Later in December 2012, he joined the dance group SM The Performance, along with fellow member
Lay,
TVXQ's
Yunho,
Super Junior's
Eunhyuk and
Donghae,
Shinee's
Minho and
Taemin. The group first made its appearance at the event
SBS Gayo Daejeon on December 29, and performed their single "
Spectrum". The single was officially released the next day. In August 2014, Kai was featured in the song "Pretty Boy" from
Shinee member
Taemin's
debut album.
2016–2019: Acting career and SuperM Family Concert in Seoul, June 2018 In January 2016, Kai made his acting debut as the male lead in the web drama
Choco Bank, which achieved record-breaking viewership. In December 2016, he starred in two episodes of the special web drama
7 First Kisses which was produced by
Lotte Duty Free. In January 2017, Kai was announced to be starring as the male lead in the
KBS teen drama
Andante, playing a high school student. In February 2017, he was cast in the Japanese drama
Spring Has Come, based on the Japanese novel of the same name. The drama marks the first time a non-Japanese actor taking a lead role on a drama produced by the broadcasting station
Wowow. On February 25, 2018, Kai performed a solo dance at the ending ceremonies of the
PyeongChang Winter Olympics before joining the
Exo members for a performance of "
Growl" and "
Power". In February 2018, it was announced Kai was cast as Ato in the
KBS melodrama
The Miracle We Met. When asked why Kai was cast, the show's writer stated, "Since Ato himself is from the divine realm, we cast an actor with the image of a male god." For his performance, Kai was nominated for Best New Actor at the 32nd
KBS Drama Awards. On August 7, 2019, Kai was confirmed to be a member of
SuperM, a "K-pop supergroup" created by SM Entertainment in collaboration with
Capitol Records. The group's promotions are scheduled to begin in October and are aimed at the American market. SuperM debuted with the group's
self-titled debut EP on October 4, 2019.
2020–2022: Solo debut and variety activities On July 3, 2020, SM Entertainment announced that Kai's first solo album was currently under production with the goal of being released in the second half of 2020. On November 30, 2020, Kai released his debut extended play
Kai and its lead single "
Mmmh". The album peaked at number 2 on the
Gaon Album Chart and has been
certified Platinum by the
KMCA. On November 30, 2021, Kai released his second extended play
Peaches and its lead single of the
same name. The album peaked at number 3 on the Gaon Album Chart and has also been certified Platinum. In 2021, Kai became an active entertainer in Korean variety shows, joining the cast of shows such as
New World,
Honeymoon Tavern,
Idol Dictation Contest and
The Devil Wears Jungnam. One of the producers of
New World praised Kai's participation on the show, saying "[Kai] is really good at entertainment." At the 2022
Blue Dragon Series Awards, Kai won Best New Male Entertainer for
New World. On November 19, 2021, Kai opened his own personal YouTube channel to share vlogs and other video content.
2022–2024: Solo activities and military enlistment Throughout 2022, Kai performed at several
K-pop festivals as a soloist, starting with Kpop Flex in
Frankfurt on May 14 and 15. On June 24th, Kai performed at the
Waterbomb Festival in
Seoul. He headlined
HallyuPopFest London on July 10 and
HallyuPopFest Australia on August 14. He joined other
SM Entertainment artists for the
SMTOWN LIVE 2022: SMCU EXPRESS @TOKYO shows on August 27–29th. In February 2022, a new original variety show ''Kai's Bucket List'' was announced with five episodes being released. In the show, Kai goes on a trip to
Gangwon-do with friends and enjoys various extreme sports, camping, water activities, and spending time healing. In December 2022, Kai participated in the release of the song "Hot & Cold" alongside other
SM Entertainment artists
Red Velvet's
Seulgi,
Aespa's
Karina and
NCT Jeno for the
2022 Winter SMTOWN: SMCU PALACE album. In January 2023, Kai conducted the solo concert tour
KAI Japan Special Live 2023 in three cities in Japan. In February 2023,
SM Entertainment confirmed that Kai plans to release a new solo album
Rover on March 13. On March 13, Kai released his third extended play
Rover and its lead single of the
same name. For
Rover, Kai won his first music show award as a solo artist on
Music Bank, followed by a second award on
Show! Music Core. On May 4, 2023,
SM Entertainment announced that Kai would have a fan meeting titled, "Kai's aKAIve", at YES24 Live Hall on May 9 at 19:00 (
KST) and also broadcast live on
Exo's official YouTube channel, two days before he enlisted to the military. On February 14, 2024,
SM Entertainment subsidiary
Studio Realive and AmazeVR released "LYNK-POP The VR Concert – Kai", a
virtual reality concert filmed before Kai started his military enlistment. The VR concert was released exclusively in theaters at
Megabox COEX in
Seoul and ran for three weeks. On the opening day, the film boasted a high seating rate of 74.62%, and even recorded a repeat viewing rate of nearly 15% from the first day of release. It garnered a positive response online, recording over 300 blog reviews and near-perfect scores, including a 10-point rating from
Megabox audiences, a 98% re-watch rate in an internal survey, and a 99.9% recommendation rate. The
Instagram CEO
Adam Mosseri watched the film while visiting Seoul.
2025–present: Solo and group activities On February 11, 2025, a day after Kai's discharged from the military, he hosted a special live broadcast on
Exo's YouTube, TikTok, and Weverse accounts titled
Kai: Happily Ever After. On February 17, 2025, Kai was announced as the new host of the web variety show
Changing Majors, a program where Kai visits different universities across
South Korea and experiences various departments firsthand. The sixth season recorded 103.52 million cumulative views and Kai's voice impression scenes throughout the 88th episode became a trending meme. On March 5, it was reported that Kai was set to release his fourth EP in April 2025, with music video scheduled to film next week. On April 3, Kai released the pre-release single "Adult Swim", which was promoted at
M Countdown and the SBS
Inkigayo UNICON concert at the
Tokyo Dome. On April 21, 2025, Kai released his fourth extended play
Wait On Me and its lead single of the same name, his first album after a two-year hiatus due to military enlistment. Starting in May 2025, Kai embarked on his first solo concert tour
KAION, performing in 10 cities in Asia and six cities in North America. The tour concluded with three encore shows in Seoul from September 26–28th. On November 5, 2025, Kai was featured in the song "Waterfalls" from
TVXQ member
U-Know's first full-length album. In January 2026, Kai was announced as one of the hosts for a new
SBS talk show
Uh, but Like, Seriously!. His casting was later praised by television critic Jung Seok-hee, "The best thing this program did was hiring Exo member Kai." On January 19, 2026, Kai joined Exo for the release of their 8th full-length album
Reverxe. He participated in Exo's concert tour
Exo Planet 6 – Exhorizon, which began with three shows in
Seoul from April 10–12, 2026. == Artistry ==