At 36 years old, Lee Seung-gi has this physical status:
Scouted by singer Lee Sun-hee, Lee Seung Gi trained for two years before debuting on June 5, 2004, at the age of 17. "Because You're My Girl", his debut song from his first album The Dream of a Moth, became a popular ballad which created a 'liking older women' syndrome in South Korea. With this song, he won the Best Newcomer award in various music awards ceremonies in 2004, such as the M.net KM Music Festival and Seoul Music Awards. In 2007, he also won the Best Male Solo Artist award at the M.net KM Music Festival with his song White Lie from his third album Story of Separation.
He released a digital single titled Will You Marry Me in 2009, which became a hit in South Korea. With this single, he received the Digital Single Bonsang award in the 24th Golden Disc Awards. The same year, he released his fourth album Shadow, which was a success and received 40,000 pre-order copies before its release.
In 2010, he recorded a duet version of his 2007 song Smile Boy with South Korean figure skater Kim Yuna, which became the official 2010 FIFA World Cup commercial song in South Korea. He also received the Digital Single Bonsang award for the second consecutive time at the 25th Golden Disc Awards with his song Love Taught Me To Drink. This was followed by the release of his fifth album, Tonight in 2011, a departure from his usual traditional ballads and encompasses more of a rock band-style sound and melodies. The title song Aren't We Friends instantly topped online music charts upon release. His other single, Era of Love also earned the No. 1 spot on that week's Billboard K-Pop Hot 100.
On March 6, 2012, Seung Gi made his debut in Japan with the release of his first Japanese album Time for Love (also translated as Alone in Love) and a single of the same title. Both the album and single ranked number one on the Oricon Daily Chart. To celebrate his success, Lee held a fanmeeting at Tokyo Dome City Hall. He held a concert at Nippon Budokan, Tokyo, on June 1, 2012, three months after his debut.
Back in South Korea the same year, he released an EP titled Forest. The title song Return set a record for being number one for six consecutive weeks on Billboard's Korea K-Pop Hot 100.
On June 10, 2015, he made his music comeback with his sixth album And... after a hiatus of two years and seven months.
On January 21, 2016, his agency, Hook Entertainment, announced that he would be enlisting for his mandatory military service on February 1. As a gift to fans, he also released a new track on January 21 at noon, titled I Am Going to the Military. On March 3, 2016, his song Meet Someone Like Me was released. The single is the last song he recorded before joining the army, and was produced by Psy.
On November 15, 2020, he released a pre-released track titled The Ordinary Man (뻔한 남자), ahead of his anticipated seventh album The Project, which was released on December 10, 2020.
On June 21, 2022, his agency announced that Lee will be partnering with guitarist Lee Byung-ho from Captain Planet's songwriting team to release the project's theme song on July 1.
In 2004, Lee Seung-gi starred in MBC's sitcom Nonstop 5. He then officially debuted as an actor in KBS's 2006 weekend drama The Infamous Chil Sisters.
He was then cast as the male lead in SBS's weekend drama Brilliant Legacy in 2009, co-starring Han Hyo-joo. The drama maintained its top spot in viewer ratings throughout its run, with its final episode attaining a viewer rating of 47.1%. The huge success boosted Lee's popularity as an actor and led to increased advertising offers for the actor. For his performance in the drama, he received the "Excellence in Acting" award, the "Top 10 Stars" award and the "Best Couple" award with Han Hyo-joo at the 2009 SBS Drama Awards.
This was followed by SBS's fantasy drama My Girlfriend Is a Nine-Tailed Fox in 2010, playing a university student who (despite strong discouragement from his grandfather) wants to drop out in order to pursue his dream of becoming an action movie star. His performance earned him his second "Excellence in Acting" award at the 2010 SBS Drama Awards.
He then starred in MBC's action drama The King 2 Hearts (2012) with Ha Ji-won, fantasy-historical drama Gu Family Book (2013) with Bae Suzy, and SBS's police drama You're All Surrounded (2014).
In 2015, Lee Seung Gi made his film debut with romantic comedy Love Forecast which co-stars Moon Chae-won.
In July 2015, Lee was cast in the period comedy film The Princess and the Matchmaker with Shim Eun-kyung, directed by The Face Reader director Han Jae-rim. The film was released in 2018.
In 2017, he was the lead actor in the fantasy drama A Korean Odyssey, written by the Hong sisters. This marked his first project after enlistment.
In 2019, he and Bae Suzy starred in the spy action drama Vagabond as their second drama together. With this drama, he received the Top Excellence Award in a Miniseries and the "Best Couple" award with Bae Suzy at the 2019 SBS Drama Awards.
In 2021, Lee starred alongside Lee Hee-joon in the crime thriller Mouse, playing the role of Jeong Ba-reum, which earned him the Grand Award (Daesang) for best actor in TV category at the 6th Asia Artist Awards.
On April 7 2022, Lee was confirmed to appear in a KBS drama alongside Lee Se-young titled The Law Cafe, it is a healing romance drama about a former prosecutor now landlord and a former Miss Korea now lawyer, based on a popular web novel.
Lee was a permanent cast member of the first season of 1 Night 2 Days, a segment of KBS's weekend variety show Happy Sunday, from November 2007 to February 2012. Known by his nickname heodang, his appearance on the show shot him to fame in Korea and made him a household name.
In 2008, he received the Best Popularity award in the KBS Entertainment Awards due to his popularity with audience in 1 Night 2 Days. He also earned the Top Excellence Host award in the 2010 KBS Entertainment Awards and the Daesang award with the other cast members of the first season at the 2011 KBS Entertainment Awards.
In October 2009, Lee took on a hosting role in SBS's Tuesday night talk show Strong Heart with Kang Ho-dong. It was recognized as the Best Program at the 2009 SBS Entertainment Awards and he was awarded the Netizens' Popularity award. He was again recognized for his role in the talk show and received the Top Excellence Host award for two consecutive years at the 2010 and 2011 SBS Entertainment Awards. In March 2012, Lee announced his departure from Strong Heart in order to focus on his singing career. He recorded his last episode on March 15, which was broadcast on April 3.
Lee reunited with 1 Night 2 Days cast members and PD Na Young-seok in the travel-reality show New Journey to the West in 2015.
In 2017, he joined the cast of SBS variety show Master in the House.
In 2018, he was chosen to be the MC of Mnet's reality/survival program, Produce 48. The same year, it was announced that he will join the second season of Netflix's variety show Busted!. At 2018 SBS Entertainment Awards, he won the Grand Prize (Daesang) for Master in the House, becoming the youngest entertainer to receive the award.
In 2019, he joined the cast of Little Forest – a healing variety program designed as a home kids garden development project for children. The same year, he featured in the Netflix travel show Twogether alongside Taiwanese actor Jasper Liu.
In 2020, he hosted Friday Joy Package, Hometown Flex and a singing reality show Sing Again.
In 2021, he rejoined the cast of Netflix's variety show Busted! for a third season and also joined the SBS golf entertainment show Golf Battle: Birdie Buddies. On July 24, Lee joined the reality program Loud as an MC and Special Agent, a unique position whose task is to provide the remaining contestants with warmth, guidance, and support as they prepare for the finale. On November 20, Lee featured in a Netflix game variety show, New World. On December 6, he rejoined the hit reality TV show, Sing Again, for a second season as its MC and Host. In the same year, he won the Baeksang Arts Award for Best Male Variety Performer for his work in Busted!, Twogether, Hometown Flex, Sing Again ,and Master in the House.
In 2022, Lee hosted SBS new year special program Circle House – a 10-episode healing talk show that candidly shares the real concerns of the MZ generation in Korea and seeks solutions with applicants.
On June 1, 2021, Lee Seung Gi established his own production company called Human Made. For one of its program, the company has prepared a performance exclusively for Moment House Japan which features a hybrid of documentary and live performance content. Lee took part in the production of the show as its executive producer starring Korean-American Rapper Jessi. In March 2022, Lee released a Human Made original mini documentary series about food and music titled Human Table on the global platform YouTube under the channel name HUMANMADE.