Born in Bucheon, a satellite city southwest of Seoul, in 1991, Byeon spent his early childhood there before relocating to the capital. Influenced by his older sister, he became interested in acting and modelling while at school.
His parents did not initially support his new job ambitions, but he was nevertheless allowed to enrol as a student in the Theatre and Film department at Cheongju University in Cheongju City. He went out looking for an agency to recruit him as an actor, but he was scouted as a model instead. As his career took off, he discontinued his university studies.





