Yang Yo-seob (born January 5, 1990), more commonly known as Yoseob, is a South Korean singer and musical actor. He is the main vocalist of the boy group Highlight.
Yoseob was born in Seoul, South Korea on January 5, 1990, in a small family with one older sister, Yang Hae Yeon. He first gained interest in music and started practicing singing after listening to Brian McKnight's music. He then listened to a lot of music of a similar style, but he realized that he couldn't be biased towards a certain genre and started listening to dance music and rock as well. When he was in high school, he joined a school band where he performed a lot of hard rock and metal during their performances. Yoseob actually wanted to try modern rock; however, his seniors at that time said that it would ruin the mood and ultimately not be a success.
Yoseob became a JYP Entertainment trainee, but left after receiving a bad grade from practice reviews. He moved agencies, to M Boat Entertainment (a former sister company of YG Entertainment) where he was trained for 5 years before transferring to Cube Entertainment where he finally became a member of Beast. While still a trainee at Cube Entertainment, he became a backup dancer for AJ, his soon-to-be group member and former high school friend, now known as Lee Gi Kwang, in the music videos and live performances of "Wiping the Tears" and "Dancing Shoes".