Astro, is a South Korean boy band formed by Fantagio in 2016. The group is composed of six members: MJ, JinJin, Eunwoo, Moon Bin, Rocky, and Sanha. They debuted with the single "Hide & Seek" from their debut EP Spring Up.

Stage Name: JinJin/진진
Real Name: Park Jinwoo/박진우
Nicknames: Angelic Smile
Birthday: March 15, 1996
Birthplace: South Korea
Blood Type: A
Height: 174 cm
Weight: 63 kg
Position in Group: Leader, Main Rapper, Lead Dancer, Vocalist

Color: Green
Languages: Korean, English
Instruments: drums
Education: Hanlim Multi Arts High School; NY Dance Academy

Stage Name: MJ/엠제이
Real Name: Kim Myungjun/김명준
Nicknames: Mood Maker
Birthday: March 5, 1994
Birthplace: Suwon, Gyeonggi, South Korea
Blood Type: O
Height: 175 cm
Weight: 58 kg
Position in Group: Main Vocalist
Color: Yellow
Languages: Korean

Stage Name: Cha Eunwoo/차은우
Real Name: Lee Dongmin/이동민
Nicknames: Morning Alarm, ManJjitNam
Birthday: March 30, 1997
Birthplace: Gunpo, Gyeonggi, South Korea
Blood Type: B
Height: 183 cm
Weight: 64 kg
Position in Group: Vocalist, Visual/Face of the Group
Color: Blue
Languages: Korean
Instruments: violin, guitar, piano
Education: Hanlim Multi Arts High School; Sungkyunkwan University

Stage Name: Moonbin/문빈
Real Name: Moon Bin/문빈
Nicknames: U-Know Moonbin, Sleepyhead, Binnie
Birthday: January 26, 1998
Birthplace: Cheongju, Chungbuk, South Korea
Blood Type: B
Height: 181 cm
Weight: 64 kg
Position in Group: Lead Vocalist, Lead Dancer
Color: Black
Languages: Korean
Instruments: piano
Siblings: little sister rapper Moon Suah
Education: Hanlim Multi Arts High School

Stage Name: Rocky/라키
Real Name: Park Minhyuk/박민혁
Nicknames: Chef Minhyuk, Dancing Machine
Birthday: February 25, 1999
Birthplace: Jinju, South Gyeongsang Province, South Korea
Height: 177 cm
Weight: 63 kg
Position in Group: Main Dancer, Lead Rapper, Vocalist
Color: Red
Languages: Korean
Education: Eonbuk Middle School; Seoul Music High School; Hanlim Multi Arts High School

Stage Name: Sanha/산하
Real Name: Yoon Sanha/윤산하
Nicknames: Beagle
Birthday: March 21, 2000
Birthplace: Seoul, South Korea
Blood Type: AB
Height: 184 cm
Weight: 60 kg
Position in Group: Lead Vocalist, Maknae
Color: Pink
Languages: Korean
Instruments: guitar
Hobbies: eating
Siblings: three older brothers
Education: A-Sound Music Academy