Yoseob was born in Seoul, South Korea on 5 January 1990 to a small family of one older sister. 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 did not push through it.
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".
Yoseob is now the main vocalist of Beast. He released a digital single together with Dalmatian’s Daniel titled “First Snow and First Kiss” and participated in singing original sound tracks (OSTs) for various Korean dramas such as “Happy Birthday” for More Charming by the Day and “I Cherish That Person” for My Princess. and "Loving You" – for All My Love. Yoseob has also participated in various TV shows, including KBS's "Oh! My School".
Yang Yoseob currently attends the University of East Broadcasting Arts.
