- Full name: Yoo Jeongyeon
- Date of Birth: November 1, 1996
- Nationality: Korean
- Blood type: O
- Group: Twice
- Agency: JYP Entertainment
- Debut: October 19, 2015
- Position in the group: Lead Vocalist
- Family members: mom, dad, 2 older sisters, uncle, Jeongyeon
- Nickname: ‘Girl Crush’,’Jeongyeon Mom’
- One of her sister is a Korean actress, “Gong Seung-yeon”
