Jung made his television debut on the sketch comedy show
Gag Concert in 2002. In 2005, Jung joined the cast of a new variety show called
Infinite Challenge. Though the show initially had low viewership ratings, it went on to be a hit, and several of the songs Jung recorded for the show's periodic "song festivals" charted in the top ten of South Korea's music charts. Jung joined the cast of the first season of the marriage simulation show
We Got Married in 2008. He was initially paired with television personality
Saori until her departure from the show. He was later paired with singer
Taeyeon of
Girls' Generation. The match caused an uproar from Girls' Generation fans, in part due to the 11-year age gap between the two entertainers. In 2011, Jung and rapper
Defconn became co-hosts of the new
idol-focused reality show
Weekly Idol.
Hiatus In November 2015, Jung's agency,
FNC Entertainment, announced that he was taking a break from all activities due to his anxiety disorder. At the time, he was a cast member or host on several television shows, including
Infinite Challenge,
Weekly Idol, and
Please Take Care of My Refrigerator. Jung officially left the cast of
Infinite Challenge in July 2016.
Return Jung returned as the co-host of Weekly Idol in October 2016, ending his 11-month break from television activities. In March 2018, both Jung and Defconn left
Weekly Idol. In May, they became hosts of the variety show
Idol Room.
Second hiatus On November 5, 2020, it was announced by Jung's agency
FNC Entertainment that he will take another break from all activities due to anxiety disorder relapse. In October 2021, Jung decided not to renew his contract with FNC Entertainment. On November 15, 2021, Jung founded the Matched Project (MCP) agency with
Kim Yong-man,
Kim Sung-joo, and
Ahn Jung-hwan. ==Personal life==