Jeonghan

On April 19, 2015, Jeonghan was introduced through a video teaser as one of the 13 members of Pledis Entertainment's newest boy group SEVENTEEN. The group would be introduced through the reality program Seventeen Project – The Debut Mission. On May 26, he debuted with the group with their first mini album 17 Carat.

On May 20, 2024, it was announced that Jeonghan and Wonwoo would be debuting as the unit Jeonghan X Wonwoo with their first single "This Man" on June 17. On January 16, 2025, it was announced that Jeonghan would be releasing a single featuring Japanese rock band Omoinotake titled "Better Half" on January 27.