The song was featured on the second season of We Got Married, where Jung was a cast member and one half of an on-screen couple with Seohyun of Girls' Generation.

[8] The album featured artists JJ Lin,[9] Yang Dong-geun,[10] Verbal Jint,[11] YB's Yoon Do-hyun and Peter Malick.

[12][13] One Fine Day received generally favorable reviews from music critics, who noted his growth as a singer-songwriter.

[23] In particular, his composition "Can't Stop" for the group's fifth EP was very well received and earned rave reviews from critics and K-pop fans.

He composed and produced "Fool" (also known as "Babo") as a gift for label-mate Juniel, which was featured on her debut album[26] as well as "Love is Only You" for another FNC artist, girl group AOA.

[30] In January 2019, Jung was among 25 songwriters selected for the forthcoming year to become full members of the Korea Music Copyright Association (KOMCA).

[32] As the series revolves around the life of a musical group, he played the role of the lead guitarist in the faux idol band A.N.Jell.

[37] In 2011, Jung was cast in MBC's youth campus drama Heartstrings, along with fellow band member Kang Min-hyuk.

[42][43] Despite suffering from low ratings,[44] Jung received positive reviews from critics and producers for his improved acting in the series.

[47][48] In 2017, Jung made his big-screen debut in the Chinese gastronomy film Cook Up a Storm alongside Nicholas Tse.

[51] In 2020, Jung made a special appearance in the sci-fi film, P1H: The Beginning of a New World, following his military discharge in late 2019.

[52] In 2021, Jung starred in the comedy and fantasy drama, Sell Your Haunted House alongside Jang Na-ra.

The show premiered on December 6, 2009, but was forced to prematurely cease its run in mid-January 2010 due to protests by animal-rights groups.

[55] He subsequently continued as one of the MCs on the replacement program Eco House, which deals with global climate change.

In December 2017, it has been reported that Jung has taken part in a public campaign for children with hearing disabilities run by Audiology Development Foundation in China.

[66] He donated 50 million won to the Miral Welfare Foundation to celebrate this year's International Day of Disabled Persons on December 3.

[68] Jung donated 20 million won for the victims of forest fires Gangwon Province through Hope Bridge National Disaster Relief Association.

He was reportedly being investigated for allegedly earning approximately $347,000 through buying stocks in FNC Entertainment after learning about their plans to sign a major celebrity.

[71] On October 31, FNC Entertainment announced that they would take legal action against malicious rumors about the singer after being framed of insider trading.

[73] It was later revealed that he attended the interview separately at his agency FNC Entertainment at the request of the professor in charge of student admission.