Jin Jin 진진 is Astro's leader. He is also the group's main rapper and main dancer.
He was born Park Jinwoo 박진우 on Friday, March 15, 1996, in Nowon District.
He was born in the Chinese Year of the Rat and his zodiac star sign is Pisces. He is 174 cm or 5'8½" tall. His blood type is A.
He took five years of drum lessons and began dancing in his second year of middle school. The first two dance styles he learned were street and house. He entered Hanlim Multi Art School with the highest score among the first-year students with his house dancing. He previously attended NY Dance Academy for three years before he became a trainee in Fantagio.
- Four members of Astro were born in March: MJ, Jin Jin, Eunwoo, and Sanha.
- The height difference between tallest member Moonbin and shortest member Jin Jin is 9 cm or about 3.5 inches.
- MJ, Jin Jin, and Rocky are all under the zodiac star sign Pisces.