Jung Jungkyun 정정균 is Bigflo's leader and main vocal.
Jungkyun was born on Friday, November 27, 1987. He was born in the Chinese Year of the Hare and his zodiac star sign is Sagittarius. He's Bigflo's oldest member, and the age gap between him and the maknae, Hightop, is 6 years, 3 months, and 20 days.
He's 180 cm or 5'11" tall. His blood type is A. He speaks Japanese.
Jungkyun used to be a member of the idol groups N-Train and Tachyon. He plays the piano, guitar, bass, and drums. He worked on composing, writing, and arranging Bigflo's first album and is the group's main producer.
He loves working out.
Jungkyun enlisted in the military in June of 2016 and is currently serving.