Birthname: Jeong Jae-hyun (์ ์ฌํ), Jeong Yoonoh (์ ์ค์ค) (later) English Name: Jay
Stage Name: Jaehyun (์ฌํ)
Birthplace: Seoul, South Korea
Birthdate: February 14, 1997 (age 23)
Zodiac Sign: Aquarius
Position: Lead Vocalist; Lead Dancer; Rapper; Visual
Nickname: Woojae, Jeffrey, J, Jeong Jaeyuk, Valentine Boy, Umchinah, Bbang jae, Memory Manipulator, Peaches, Nation's first love
Height: 181 cm
Weight: 63 kg
Blood Type:A
Nationality: Korean