Lee Jun-young (born January 22, 1997), also known as Jun, is a South Korean singer, rapper and actor who debuted as a member of the boy band U-KISS in 2014. He joined the survival program The Unit (2017–18) and won to become the center and main vocalist of the project group UNB. As an actor, he has achieved wider recognition for his roles in the Netflix series D.P. (2021), Mask Girl (2023), When Life Gives You Tangerines (2025) and Weak Hero Class 2 (2025).

Beyond his work in music and acting, he has participated in musical theatre, dance battles, variety programs, art exhibitions, and hosting activities, which has led some to describe him as a 'hexagonal trendsetter' for his versatility across multiple fields.