2008–2009: Career beginnings and Shinee Choi was discovered at the SM Casting System in 2006 and modeled for Ha Sang-beg's Seoul Collection F/W 08–09 in March 2008. One month later, Choi was chosen as a member of the group
Shinee. The five-member boy group debuted on May 25, 2008, on
SBS'
Inkigayo. The group's first EP,
Replay, was released on May 22 and debuted on the Korean music charts MIAK at number ten, peaking at number eight. Choi began participating in the rap making of Shinee's songs with their first studio album
The Shinee World, under the guidance of rap instructor JQ. JQ praised Choi's writing ability and pointed out that he has many good ideas and "a few genius moments here and there". He was especially pleased with Choi's rap lyrics for Shinee's 2009 single "Juliette". In 2009 and 2010, Choi appeared in both the Korean and Japanese versions of
Girls' Generation's music video "
Gee". He was also featured in the music video of VNT's debut song "Sound" in 2010. In 2009, Choi joined the popular show ''
Let's Go! Dream Team'' as a regular cast member.
2010–2015: Acting debut In 2010, Choi joined the variety show
Oh! My School as a cast member and began hosting the music program
Show! Music Core alongside bandmate
Onew,
Miss A member
Suzy and
T-ara member
Jiyeon. He made his acting debut in
KBS2's drama special, entitled
Pianist, with actress
Han Ji-hye. In 2011, Choi was cast in SBS' sitcom,
Salamander Guru and The Shadows. He played the role of a genius hacker. In 2012, Choi was confirmed to take on the lead role, alongside
f(x)'s
Sulli and
Lee Hyun-woo, in
To the Beautiful You, a Korean adaptation of the manga
Hana-Kimi. The drama started broadcasting on August 15, 2012, on SBS. In preparation for his role as a high jump gold medalist, Choi received personal training from coach Kim Tae-young, former national high jump athlete and a member of the Korea Association of Athletics Federations, for a month and a half. In December 2012, Choi joined dance project group
SM The Performance alongside labelmates from
TVXQ,
Super Junior, Shinee, and
Exo. Choi began hosting the variety show
Mamma Mia in April 2013, but departed after a month due to Shinee's touring schedule. He resumed his role as an MC on
Show! Music Core after a two-year absence, this time hosting alongside
Kim So-hyun and
Noh Hong-chul. In July 2013, Choi returned to the small screen with
MBC's
Medical Top Team. His performance received a positive response and was praised for his growth as an actor. In August, he participated in the reality series
Star Diving Show Splash, but it was cancelled after four episodes after several contestants were injured. In 2015, Choi was cast as the lead in
OnStyle's drama
My First Time together with actress
Park So-dam, which was broadcast in September. It was the first drama premiered by OnStyle, with a total of eight episodes.
2016–2020: Big screen debut, solo music and military enlistment '' in November 2016 In early 2016, Choi extended his popularity as an actor. He was cast in several projects, including a historical Korean drama entitled
Hwarang: The Poet Warrior Youth, which began airing on December 19, 2016, on KBS2. His debut movie project titled
Canola, alongside
Youn Yuh-jung and
Kim Go-eun and directed by Yoon Hong-seung (pseudonym
Chang), was filmed in 2015 and released on the big screen in May 2016. He was cast in a supporting role in a film entitled
The Princess and the Matchmaker, led by
Lee Seung-gi and
Shim Eun-kyung. The movie is the second installment in a planned trilogy by Jupiter Films after the 2013 box-office hit
The Face Reader. Choi was then cast in the movie
Derailed alongside veteran actor
Ma Dong-seok, which was directed by Lee Seong-tae and premiered at the
2016 Cannes Film Festival. The movie had its world premiere screening at the 21st
Busan International Film Festival in October 2016. In 2017, Choi took part in the
JTBC web drama entitled
Somehow 18 alongside
Lee Yu-bi. As a result of high online viewer ratings, the web drama was broadcast on television through JTBC. After receiving a positive response for his acting performance in
Derailed, Choi stated that he chose the role because he wanted to work with director
Kim Jee-woon. The film released on July 25, 2018. In September 2017, Choi received the Special Award at the due to his widespread popularity in the country as well as for his performances in various dramas. Choi was the first Korean artist to be presented an award at the show. On November 15, Choi was included in
Vogues list of the "Sexiest Men Alive". Later that year, Choi was cast in a four episode mini drama
The Most Beautiful Goodbye, which is a remake of the 1996 drama of the same name. In March 2019, Choi released his debut solo single, "I'm Home", as part of
SM Station. He then enlisted for the
Marine Corps on April 15 as part of his
mandatory military service, where he was recognized as an "exemplary marine soldier" for forgoing early discharge to participate in defense drills. He completed his military service on November 15, 2020.
2021–present: Further acting roles, Chase and Call Back In January 2021, Choi resumed activities as part of Shinee. He also ramped up participation in various shows including a special appearance in web series
Lovestruck in the City He appeared in the horror film
New Normal, directed by Jeong Beom-sik. It was selected as the closing film of the
26th Bucheon International Fantastic Film Festival. He released his debut solo EP,
Chase, on December 6, 2022. Choi starred in the
Netflix series
The Fabulous alongside
Chae Soo-bin later that month. He also released the digital single "Stay for a Night". In August 2024, he starred in the JTBC drama
Romance in the House. In September, he appeared in his first play,
Waiting for Waiting for Godot, alongside
Lee Soon-jae. He portrayed the role of Val, an understudy continually waiting to go on stage; however, the production was cut short due to Lee's health issues. Choi released his first studio album,
Call Back, on November 4, 2024. He held his first solo concert, Mean: Of My First, later that month, at the
Hwajeong Tiger Dome in Seoul. He later held shows in Taiwan, Japan, Macau and the Philippines. He appeared in the play
Rendezvous in April 2025. In September, he resumed his role as Val in a new production of
Waiting for Waiting for Godot. He released the single album
Tempo on December 15. ==Personal life==