Yoon Doo-joon, also known mononymously as Doojoon or Dujun, is a South Korean singer and actor. He is the leader of the South Korean boy group Highlight.

Highlight is a South Korean boy band formerly known as Beast (Korean: 비스트). The band consists of four members: Yoon Doo-joon, Yang Yo-seob, Lee Gi-kwang, and Son Dong-woon. Originally a six-piece band, Jang Hyun-seung departed from the group in April 2016, and Yong Jun-hyung departed in March 2019. In late 2016, the group moved labels from Cube Entertainment to Around Us Entertainment and subsequently changed their name to Highlight in 2017.