Lee Hong-gi height - How tall is Lee Hong-gi?

On 30 September 2019, Lee began his mandatory military service, becoming the first F.T. Island member to enlist.

In 2015, Lee announced through social media that he was working on both a Korean and Japanese album, which was released in November and December respectively. The mini Korean album was revealed to be FM302, and the album was released on 18 November 2015, while the Japanese album was revealed to be AM302, and it was released on 9 December 2015. 'FM302' combines the radio terminology frequency modulation (FM) with Lee's birthday which is on 2 March, to create the effect of his own radio frequency that resonates his music across the world. The title song "Insensible" is a ballad track and it tells the sad story of a man who is unable to forget his previous love. The music video was published on 18 November 2015. The lead actress of the music video is actress Park Shin-hye. Prior to his official music video release, a showcase was organised. Upon the release of FM302, it topped both Naver's real-time search chart, as well as Hanteo sales chart. The album still retained its position next week, selling more than 19,000 albums within two weeks. Moreover, six days after the release of the album, Lee won first place on SBS MTV's The Show for the first time. The album charted at No. 2 on Gaon Chart's national physical albums ranking, as well as No. 5 on the Gaon Social Chart in the 3rd week of November.

On the other hand, the music video for the lead single of the Japanese album AM302, "モノローグ (Monologue)", was published on 11 November 2015 on F.T. Island's Official Japanese YouTube channel. The Japanese album contained some tracks from the Korean album FM302, but was translated into Japanese. The album is also available in three different sets, namely, the original version, Primadonna version (for fans), and the limited edition DVD version. Upon release, it charted at #4 in the Oricon charts.

On 21 May 2015, Dal Shabet's official YouTube channel uploaded a video titled Joker in Rock Version. The video was a collaboration with Lee and Subin singing Joker in rock version. It was believed that the two decided on a collaboration when Lee and Subin met on Hello Counselor.

Lee also starred in SBS Modern Farmer alongside Park Min-woo, Lee Ha-nui, and others. The drama aired from 18 October 2014 to 21 December 2014, at 20:40 on Saturdays and Sundays.

Lee started his own fashion brand 'Skullhong' in June 2014. He designs accessories, jewelry and various nail products. It was originally based in Seoul, but has since expanded its business to Hong Kong, and Tokyo, Japan.

In June 2013, he made his big screen debut in the movie Rockin' on Heaven's Door (Korean title: Passionate Goodbye), with Baek Jin-hee, in which Lee portrayed as a rebellious music star who is sent to work in a hospice.

Lee began filming Bride of the Century with Yang Jin-sung. He went on a four-week rest after he dislocated his shoulder and suffered facial fractures during December 2013. He resumed shooting in January 2014, and the drama aired that February.

In April 2011, Lee starred in the TBS Japanese drama Muscle Girl! opposite Yui Ichikawa. This was followed by a 90-minute Korean-Japanese co-production titled Noriko Goes to Seoul, in which he played a young aspiring singer who meets an older woman (Takashima Reiko) who inspires him through hardships to achieve his dream.

As an actor, Lee has participated in various television dramas, notably You're Beautiful (2009), Bride of the Century (2014), Modern Farmer (2014) and A Korean Odyssey (2017).

Lee then played Lysander in a Korean musical theatre version of A Midsummer Night's Dream, where he showcased his singing, acting and dancing skills. In 2009, after a five-year break, he made his acting comeback and took the role of the quirky but loveable drummer Jeremy in You're Beautiful. To promote the drama, he also contributed solo tracks to the OST, such as "Promise" and "Still/As Ever." He received a New Star Award at the 2009 SBS Drama Awards for his performance. You're Beautiful recorded modest ratings in South Korea, but it became an international success and with it, Lee's worldwide popularity increased.

In 2008, he was offered the lead role in Master of Study, the Korean adaptation of Japanese drama Dragon Zakura. Master of Study should have aired in the beginning of 2009 but due to preproduction difficulties, the drama was postponed to the beginning of 2010 which led FNC Entertainment to refuse Lee's role because of his busy schedule with the band.

In 2007, Lee debuted in the band F.T. Island as the lead singer. He can also rap and beatbox.

Before Lee Hong-ki debuted as a singer with the band F.T. Island, he was a child actor, making his acting debut in 2002 in the KBS2 TV series Magic Kid Masuri as Masuri's friend. This sitcom gained popularity among elementary school students. He was also featured in Kkangsooni, where he played the character of Eo Soo-bong, and sang for the sitcom's OST.